# Welcome to FPSAC 2022

34th International Conference on Formal Power Series & Algebraic Combinatorics

Topics include all aspects of combinatorics and their relation to other parts of
mathematics, physics, computer science, chemistry and biology

A satellite conference of ICM 2022

July 18–22, 2022, Indian Institute of Science, Bangalore, India

#### Conference Photos

Here are some photographic albums from the conference. Unless stated otherwise, they are taken by the official photographer.

Here are some personal albums.

## Invited Speakers

### Omer Angel

University of British Columbia

Even subgraphs and Loop O(1) as factors of IID

### Sen-Peng Eu

National Taiwan Normal University

Signed statistics on permutations — from symmetric group to Coxeter groups

### Apoorva Khare

Indian Institute of Science

Equalities and inequalities involving Schur polynomials

### Daniela Kuhn

University of Birmingham

Proof of the Erdos-Faber-Lovasz Conjecture

### Anton Mellit

University of Vienna

Loehr-Warrington conjecture, shuffle conjectures and enumeration of p-tableaux

Museum of visual ART. Guided tour

### Hugh Thomas

L'Université du Québec à Montréal

Combinatorics of scattering amplitudes

### Rekha Thomas

University of Washington

Graphical Designs

### Cynthia Vinzant

University of Washington

Log-concavity in matroids and expanders

## Special talks

### Chris Bowman

University of York

Kronecker Products, Modular Representations, and Character Vanishing: results and conjectures of Christine Bessenrodt

### P. P. Divakaran

Chennai Mathematical Institute

Pingala and the beginnings of combinatorics in India

Go to the Schedule section for information on contributed talks. The videos for all talks are available on the FPSAC 2022 playlist.

## Program Committee

Ilse Fischer
Co-chair
University of Vienna

Svante Linusson
Co-chair
KTH Royal Institute of Technology, Stockholm

Jean-Christophe Aval
CNRS, Université de Bordeaux

Andrew Berget
Western Washington University

Jérémie Bouttier
CEA, Université Paris-Saclay

Cesar Ceballos
TU Graz

Guillaume Chapuy
CNRS, Université de Paris

Sunil Chhita
Durham University

Sylvie Corteel
University of California Berkeley and CNRS, Université de Paris

Rafael S. González D'León

Basudeb Datta
Indian Institute of Science, Bangalore

Philippe di Francesco
University of Illinois at Urbana-Champaign

Jehanne Dousse
CNRS, Université Lyon 1

Mark Dukes
University College Dublin

Éric Fusy
CNRS, Université Gustave Eiffel

Jia Huang

Matthieu Josuat-Vergès
CNRS, Université de Paris

Jang Soo Kim
Sungkyunkwan University

Christoph Koutschan
RICAM, Austria

Diane Maclagan
University of Warwick

Hannah Markwig
Universität Tübingen

Alejandro Morales
University of Massachusetts, Amherst

CNRS, Université Lyon 1

Eran Nevo
Hebrew University

Nagoya University

Viviane Pons
Université Paris-Saclay

The Institute of Mathematical Sciences, Chennai

Michael Schlosser
University of Vienna

Armin Straub
University of South Alabama

Vasu Tewari
University of Hawaii

Jiang Zeng
Université Lyon 1

## Organizing Committee

Arvind Ayyer
Chair
Indian Institute of Science, Bangalore

Gaurav Bhatnagar
Ashoka University, Delhi

Atul Dixit
Indian Institute of Technology, Gandhinagar

Gyula O. H. Katona

Indian Institute of Technology, Bombay

Narayanan N.

K. N. Raghavan
The Institute of Mathematical Sciences, Chennai

Venkatesh Rajendran
Indian Institute of Science, Bangalore

Pooja Singla
Indian Institute of Technology, Kanpur

Sivaramakrishnan Sivasubramanian
Indian Institute of Technology, Bombay

Bridget Tenner
Executive Committee Liaison
DePaul University

S. Viswanath
The Institute of Mathematical Sciences, Chennai

Nathan Williams
NSF Funding Coordinator
University of Texas at Dallas

Travis Scrimshaw
Proceedings Editor
Osaka City University

• Paper/poster submissions open
• October 25, 2021
• November 25, 2021
• Submission decisions
• March 4, 2022
• Deadline for software demonstration submissions
• April 1, 2022
• Deadline for NSF support requests
• April 1, 2022
• Deadline for final extended abstract submissions
• April 1, 2022
• NSF financial support decisions
• April 15, 2022
May 1, 2021
• Early-bird registration ends
• May 15, 2022
• Poster marathon submissions
• July 6, 2022
• Conference
• July 18-22, 2022

## Registration

Registration for FPSAC 2022 is now closed.

## Local information

#### Venue

The conference will be held in the Faculty Hall in the historic Main Building (constructed in 1919) at the Indian Institute of Science. It houses the administration of the institute and the large 300-seater Faculty Hall, where the conference will be held. Posters will be showcased in the adjoining foyer.

A banner in the mathematics department advertises the conference!

#### Financial Support

We expect to get some money to support the attendance of some participants to FPSAC 2022. If you wish to apply for support to FPSAC 2022, fill this form. Preference may be given to graduate students and early career mathematicians. If you have any queries, write to sfandnt at gmail dot com.

#### Accommodation

IISc has many guest houses on campus. We have reserved rooms at the following guest houses within the campus:

Reservations will be made strictly on a first-come-first-served basis. Once you have paid the registration fee, contact Ms. Abhinandana C. (abhinandanac at iisc dot ac dot in) to make a reservation.

Accommodation is also available in the Green Path Eco Hotel at walking distance from the IISc campus. The special rate for the conference is INR 2000 for a single room and INR 2500 for a double room per night, plus tax. Contact rashmi at thegreenpath dot in for booking and mention that you are a participant at FPSAC to get the discounted rate.

We have also reserved 10 rooms at the 5-star Sheraton Grand Bangalore Hotel at Brigade Gateway. To avail the special rate for the conference (INR 7500 for a single room and INR 8000 for a double room per night, plus tax), click on this link. Contact ashwin dot srivastava at sheraton dot com if you face any issues while booking.
Caveat: To avail this rate, more than 5 rooms need to be booked using the above link. If that does not happen, you will have to pay the regular rate.
We will try to arrange daily transportation for participants from the hotel to the venue.

Hotel Booking Spam Alert! Please do not respond to spam emails or messages about hotels in Bangalore. Details about hotel accommodation will soon be available on this page. All officials emails about FPSAC 2022 will only be sent from fpsac2022.math at iisc dot ac dot in.

#### In-person participants

The following participants have registered for in-person attendance.

Alex McDonough
University of California Davis

Torin Greenwood
North Dakota State University

Ana Clara Garcia Elsener
Universidad Nacional de Mar del Plata

Fern
University of Sydney

Mitchell Ryan
University of Queensland

Benjamin Solomon
University of Queensland

Michael J. Schlosser
University of Vienna

Christian Krattenthaler
University of Vienna

Martin Rubey
TU Wien

Chris Bowman
University of York

Omer ANGEL
University of British Columbia

Hugh Thomas
Université du Québec à Montréal

Jorge Alberto Olarte
TU Berlin

Daniel Tamayo Jiménez
Université Paris-Saclay

Frether

Fufa Beyene

Doriann Albertin
Université Gustave Eiffel

Pascal Weil
CNRS

Ekaterina Vassilieva
École polytechnique

Erkan Narmanli
École polytechnique

Germain Poullot
Sorbonne University

David Wahiche
Université Claude Bernard Lyon

Corentin Henriet
Université Paris-Cité

Balthazar Charles
Université Paris Saclay

Arthur Rodelet
Université Gustave Eiffel

Sophie Rehberg
Freie Universität Berlin

Kevin Limanta
University of New South Wales Sydney

Eran Nevo
Hebrew University

Yuval Roichman
Bar-Ilan University

Isaac Konan
Universite Claude Bernard Lyon

Takafumi Kouno
Waseda University

Mikolaj Marciniak
Nicolaus Copernicus University

Maciek Dołęga

Lukasz Maslanka

Jihyeug Jang
Sungkyunkwan University

Jang Soo Kim
Sungkyunkwan University

University of Ljubljana

KTH Royal Institute of Technology

Svante Linusson
KTH Royal Institute of Technology

Stockholm University

Houcine Ben Dali
Université de Lorraine Nancy

Olivia Nabawanda
Makerere University

Nimisha Pahuja
IISc Bangalore

O. P. Bhardwaj
IIT Gandhinagar

Karthika Rajeev
University of Bielefeld

Surjo
IISc Bangalore

Naren
HFN Inc.

Digjoy
TIFR Mumbai

Nishu Kumari
IISc Bangalore

Biltu Dan
IISc Bangalore

Irfan
IISc Bangalore

N/A

IISER Pune

Dibyendu
IIT Bombay

Chayan
IIT Bombay

Dhruv
IISER Pune

Mrigendra Singh Kushwaha
IISc Bangalore

Varun Shah
IISER Pune

Jyotirmoy
Chennai Mathematical Institute

Mohan Ravichandran
Bogazici University

Mahesh Kakde
IISc Bangalore

Kamalesh Saha
IIT Gandhinagar

Hiranya
IISc Bangalore

Anton Mellit
University of Vienna

Dante Luber
Technische Universität Berlin

Charles Wang
Harvard University

Jacob Blue
University of Texas Rio Grande Valley

Sara Billey
University of Washington

Melissa Sherman-Bennett
University of Michigan

Elizabeth Kelley
University of Illinois Urbana-Champaign

Andrés R. Vindas Meléndez
University of California Berkeley

Sean Griffin
University of California Davis

Cynthia Vinzant
University of Washington

Sheila Sundaram
Pierrepont School

Tom Roby
University of Connecticut

Grant Barkley
Harvard University

Olya Mandelshtam
University of Waterloo

Harry Richman
University of Washington

Travis Scrimshaw
Hokkaido University

Eric Marberg
Hong Kong University of Science and Technology

Arka
IISc Bangalore

Shivani
IISc Bangalore

Siva
IMSc Chennai

R. Venkatesh
IISc Bangalore

Monu
IIT Guwahati

Anurag Singh
IIT Bhilai

Terrence George
University of Michigan

Dipnit Biswas
IISc Bangalore

Anita Arora
IISc Bangalore

Bishal Deb
University College London

Rekha Thomas
University of Washington

Amri
IMSc Chennai

Ratheesh.T.V
IMSc Chennai

Sathish Kumar V
IMSc Chennai

Vishal Bhardwaj
NIT Manipur

Aritra Bhattacharya
IMSc Chennai

S. Venkitesh
IIT Bombay

K N Raghavan
IMSc Chennai

Siddheswar Kundu
IMSc Chennai

Krishna Menon
Chennai Mathematical Institute

Surbhi
IIT Delhi

Priyavrat Deshpande
Chennai Mathematical Institute

Anwita
IIT Guwahati

Sagar S

Gaurav Bhatnagar
Ashoka University

Atul Dixit
IIT Gandhinagar

Arvind Ayyer
IISc Bangalore

Manoj
IIT Mandi

Apoorva Khare
IISc Bangalore

Projesh Nath Choudhury
IISc Bangalore

G. V. Krishna Teja
IISc Bangalore

Mohith Raju
IISc Bangalore

Upamanyu Y
IISc Bangalore

IIT Bombay

P. P. Divakaran
N/A

Shreeya Moghe
IISc Bangalore

Chaithra P
IISc Bangalore

AMRUTHA P
IISER Thiruvananthapuram

Aatman Supkar
IISc Bangalore

Samarth
IISc Bangalore

Ajeeth
University of Melbourne

Karthik
IISc Bangalore

Raghuram
IISc Bangalore

#### Code of conduct

The Organizing Committee of FPSAC 2022 is committed to providing a rewarding and welcoming experience for all. We are committed to ensuring that FPSAC 2022 is professional and free of harassment and discrimination in all of its events. Furthermore, we are dedicated to creating a supportive environment that benefits from the diversity of experiences of all its participants. We aim to offer equal opportunity and treatment to every participant regardless of their mathematical experience, sex, gender identity, nationality, race or ethnicity, belief, age, marital status, sexual orientation, disability, or any other factor.

We will not tolerate any form of discrimination or harassment. If you experience harassment or discriminatory behavior at a conference event, we encourage you to reach out to any member of the organizing committee so we may take appropriate actions to address the situation.

Special rules apply for hybrid conferences. We require that every participant appearing online represent themselves by the name that they use for their professional work or in conferences. In addition, any speech or imagery that is posted in the chats or forms of the various conference activities must be appropriate for professional work.

Participants who violate this code may be sanctioned and/or expelled from the event at the discretion of the Organizing Committee. Any action will only be taken with the consent of the complaining party.

If you witness harassment or discriminatory behavior, please consider intervening. We need the whole community to work together to make this event the welcoming and rewarding experience for all that we strive to achieve. Thank you for your cooperation.

Acknowledgments. Parts of this agreement are based on: Federico Ardila’s Code of Conduct of ECCO (Encuentro Colombiano de Combinatoria) available here; on the Code of Conduct of EuroCrypt 2020 available here; on statements by the Association for Women in Mathematics and the XOXO Festival; and on this website.

#### Visa Information

Please note that ALL foreign nationals, including American and EU passport holders must hold a valid visa in order to travel to India. Visas must be applied for in advance at an Indian embassy or consulate. We recommend that you register before May 6. Your information will then be sent to the relevant ministries by early May so that you will be able to apply for conference or e-conference visas in time.

The photograph specifications may be quite stringent. See here for an example of the specifications.

See here for more details.

Nationals of certain countries may be eligible for e-conference visas.

Check this website for more details

Contact fpsac2022.math at iisc dot ac dot in if you have questions about the visa process.

#### Social Events

There will be pre-registration at the Centenary Visitors House (CVH) dining hall inside the IISc campus from 5:00 to 6:30 PM on Sunday July 17.

There will be a half-day trip to Shravanabelagola leaving at 1:30pm on Wednesday, July 20. Transportation will be arranged for interested participants.

The banquet for the conference will be held at Royal Orchid Resort & Convention Centre, about ten kilometers away from the venue, on the evening of Thursday July 21. Transportation will be arranged for participants.

There will be a cultural programme on the evening of Saturday, July 23. More details will be shared closer to the date of the conference.

#### Satellite Workshops

##### Combinatorial Algebraic Geometry: Tropical and Real

International Centre for Theoretical Sciences, Bangalore, June 27 - July 8

##### Sage Days 114

The Institute of Mathematical Sciences, Chennai, July 25–27

##### Combinatorial Methods in Graph Theory

Amrita University, Coimbatore, July 14-16

##### One day symposium in honour of Basudeb Datta

Indian Institute of Science, Bangalore, July 28

##### AlCoVE (Algebraic Combinatorics Virtual Expedition) 2022

Virtual, June 6-7

##### Introductory school on Algebraic Combinatorics and Spectral Graph Theory

Mepco Schlenk Engineering College, Sivakasi, May 30 - June 18

#### Tourism

##### Tours and excursions

(Thanks to Chinmay Dharmendra for help with this section.)

Bangalore is conveniently located for many different types of travel trips. For an exhaustive list of options from Bangalore, visit the KSTDC website. The Jungle Lodges, also a government of Karnataka undertaking, offers series of resort holidays depending on activity: beach, safari etc. The service is good, and the views from the accommodations are superior to what is available from private operators.

##### Trips in and around Bangalore

• Bangalore - Possible places to spend a day or a half-day in Bangalore are

• Belur/ Halebeedu/ Shravanabelagola - Visit Hoysala period temples renowned for their stone carvings (11th century) and a Mahaveer Jain monolith. The best organized trip is one by KSTDC. More info. (Recommended)

• Mysore - The erstwhile capital of Karnataka and the abode of its last rulers. This trip covers among other things - Srirangapatna (Tipu Sultan's palace), Chamundi Hills, Mysore Palace. More info.

• Ranganthittu Bird Sanctuary - An excellent place for bird lovers. If you would like to leisurely explore the sanctuary you can make a private group trip via taxi. A possible itinerary could then be: Srirangapatna, break at Hotel Mayura (by the Cauvery river), and finally, the sanctuary. More info.

##### Overnight trips around Bangalore

• Chikmagalur – Home to some of India’s finest coffee estates, Chikamagalur is a true delight to any nature lover. You can learn about the history and varieties of coffee grown in Karnataka at the Coffee Museum. Bhadra Wildlife Sanctuary, famous for its tigers, is a great choice for any ecotourist. For those who choose to do so, an option for accommodation is provided by Jungle Lodges. Another way to experience Chikmagalur would be to explore one of the various homestays run by private operators. More Info.

• Coorg (Kodagu)– Further west of Mysore, nestled in the Western Ghats, is the hill country of Coorg. It is known for its coffee estates and its distinct Kodava culture and language. The source of the Cauvery river (Talakaveri), and the Tibetan Buddhist monastery and settlement at Kushalnagara are local attractions. KSTDC's Mayura Hotel in the district headquarters of Madikeri is an excellent overnight stay option.

• Bandipur – On a safari here you may get to spot the elusive tiger. The safari sans tiger is also memorable and can offer sightings of elephants, deers, gaurs and others. The best accommodation is offered by Jungle Lodges.

• Kabini – A safari option in Nagarhole National Park. Stay on the banks of the Kabini river on the southern fringe of Nagarhole. Again, Jungle Lodges provides the best accommodation option. (Recommended)

• Hampi – The capital city of the mighty Vijayanagara empire, which now lies in ruins on the banks of the Tungabhadra river in northern Karnataka. As a UNESCO World Heritage site, this is a must-see on any tourist itinerary of South India. More info.

• Devbagh - Located in the northwest of Karnataka, this coastline is different from the one at Goa or Kerala, and quite enjoyable. However, you will be traveling there in the Monsoon season so be prepared to risk dark clouds and pouring rain. More info.

##### Hikes and treks around Bangalore

The areas around Bangalore offer a plethora of hiking trails that offer beautiful vistas. Atop these hills one comes face to face with lakes, verdant greens, cityscapes, temples, or the ruins of historic forts. For more information about hikes and treks around Bangalore visit Karnataka state's eco tourism website. Since the conference is taking place in the monsoon season and hiking can be a dangerous activity, be sure to check the weather if you plan to go on a hike.

• Nandigiri - Perhaps the quintessential Bangalore hiking experience, located about 60km along the airport road. Nandi Hills is a perfect respite from the hustle and bustle of the city. A host of available amenities such as food, trekking guides, well marked trails, and clear signage has lead to its popularity. The original temples atop Nandi Hills are over 1100 years old which have been added to by the many dynasties that ruled over the area since then. Many other sights of historical significance such as the Tipu Sultan's Summer Palace are demarcated by the aforementioned signage so you won't miss a thing. An option for accomodation atop Nandi Hills is Hotel Mayura Pine Top. More Info.

• Skandagiri - Part of the Nandi Hills range along with the aforementioned Nandigiri, Skandagiri is one of the more challenging treks around Bangalore. Standing 1300m tall Skandagiri offers a breathtaking view of the sunrise bolstered by the cottony clouds. During the monsoon this trail get very slippery so be sure to wear approriate footwear. More Info.

• Makalidurga - Durga in the vernacular means a fort. Located in the Doddaballapura region, Makalidurga was a hill fort first established by the Vijayanagara empire and has changed hands several times since. The rocky trail makes for a rewarding trekking experience and the view from the top is sprinkled with lakes, hillocks, and bracketed by train tracks, and asphalted roads. In the interest of preservation this trek is supervised by Karnataka Eco-Tourism, and you need the Forest Department's permission. More Info

• Savandurga - Savinadurga, as it's colloquially called, is known as the fort of death due to its steep inclines. Its claim to fame is that it is one among Asia's largest monolithic rocks. During the monsoon, the rocky path can pose a challenge to trekkers. The two temples at the top are frequented by devotees across the land making this a popular destination. More Info.

##### Excursions outside Bangalore

If you wish to customise an itinerary please contact the organizers. Private taxi hire or overnight stay arrangements can be made after you get to Bangalore, except in the case of the tiger reserves of Bandipur and Nagarhole, accommodation for which should be booked in advance. The cost of hiring a taxi for a day trip will depend on mileage and type of vehicle you hire; the cost would be in the range of Rs. 15-20/km. Please note that in India when you hire a car, the driver is included, even on overnight trips! Driving in India is best left to the experts.

Cab/Taxi: You can arrange taxis from IISc campus by contacting one of the following call taxi agencies.

• Aishwarya Travels - +91-80-2364 7403 / +91-87927 12047
• Smart Travels - +91-80-2341 6564 / +91-99720 18099
• Varsha Tours and Travels - +91-80-2357 0029 / +91-99808 73172

## Submission

### Guidelines for software demonstration submissions

Algebraic combinatorics has a long tradition of using software to support research; in particular, many of the published results and conjectures have been originally discovered through computer exploration or are backed up by calculations. This growing need is supported by regular software development efforts from the researchers.

The purpose of FPSAC's software demonstrations is to encourage code sharing and reuse by providing a venue for:

• spreading the word on existing development efforts
• crediting the efforts put by researchers to not only develop software, but also share it and make it reusable

This is complemented by satellite training and collaborative development events (see e.g. Sage Days 60).

We invite presentations of any piece of software that specifically supports research and teaching in algebraic combinatorics: computational libraries, online databases, certified proofs, training portals, etc. The presenter shall be actively involved in the development.

Presenters will be given 10 minutes to demonstrate their software to participants. The focus should be on explaining what the piece of software is about and prompting potential users to want to learn more.

The selection of the presentations will be based on the submission by email to fpsac2022.math@iisc.ac.in (with subject "Software demonstration") of an extended abstract (12 pages maximum, but we recommend no more than 6 pages) in the usual FPSAC format. Abstracts will be evaluated based on content, novelty, originality, importance and the potential value of the software to the community.

Extended abstracts of accepted software presentations will be published in the conference proceedings.

The abstract will typically include:

• a description of the context and state of the art
• a description of the software itself: main functionalities, algorithms, ...
• a description of typical applications and use cases
• a comparison with existing software or algorithms
• brief evidence for the ease of use and reuse: documentation, examples of usage, availability, license, software requirements, installation instructions, (plans for) integration in existing platforms (e.g. GAP, Magma, Maple, Mathematica, or SageMath).
• brief evidence for software quality and sustainability: tests, development model, use of collaborative tools, etc.

When applicable, it is okay to link instead to a permanent web page prominently containing the latter two pieces of information.

The software itself shall be made publicly available for scrutinizing by the reviewers. If a specific platform is required, reviewers will make some efforts to get access to that platform and try the software.

### Guidelines for final paper/poster submissions

Accepted extended abstracts will be published in a proceedings volume of Séminaire Lotharingien Combinatoire. Authors will retain the right to publish a full version of their work in another journal, provided that the conference contribution is indicated as an extended abstract of the full version. For questions and problems, email the proceedings editor Travis Scrimshaw.

Before sending the final version of your submission, please read the instructions and requirements below. The requirements for the original format of the submission apply (please read Guidelines for initial submissions and Formatting requirements and submission procedures below). In particular, the default font type and font size (12 pt) must not be changed. Final submissions, including suggested corrections, must not exceed 12 pages.

Your new submission should consist of:

• A bibtex file with references (see the guidelines below)
• All other files required to compile your final submission (figures, etc., keeping in mind the guidelines below);
• A PDF file of your submission compiled from these.

• Please spell-check the text before submitting the final version – there are standard spell-checking (or check spelling) softwares in most/all OS. This includes the .bib file, where authors' names may be misspelled. E.g. Fulton ↔ Futon.
• A minor matter of style: if hyphenating between a single name, such as Piatetsky-Shapiro, use a single hyphen in the TeX source. If hyphenating between multiple names, such as Kac--Moody, use two hyphens. For example: Harish-Chandra--Itzykson--Zuber integral.
• When mentioning Remarks or Examples: these should be defined as macros using \theoremstyle, and share the same counter as definitions, theorems, lemmas, etc. They should not be unnumbered/isolated headings.
• Proofs: If you have a theorem labelled

\begin{theorem}\label{Tsample}

\begin{proof}
if the proof is located very closely after the statement of the result; or else
\begin{proof}[Proof of Theorem \ref{Tsample}]
if it is more than a few lines away, and definitely if another result is stated between Theorem \ref{Tsample} and its proof. In particular, please do not use {\em Proof.} or something similar.
• Avoid use of abbreviations like "wrt", "wlog", "iff".
• Figures: The document should be compiled (and compilable) using pdflatex (then bibtex, say, then twice pdflatex). In particular, the use of .pdf figures or tikz code is preferred.
• When compiling, please ensure that it avoids \overfull \hbox or \vbox errors.

### Bibliography guidelines

Bibliography is the .bib file, which is required during final submission, and should contain all references.

• Please be sure to delete the lines with the ISBN or ISSN fields. Note that using % may not comment out a line from .bib files, so simply delete those fields from the FPSAC accepted .bib file.
• You need not include the lines with the MRCLASS and MRNUMBER fields if you so wish, since these do not get displayed in the PDF output.
• If mentioning the DOI of an article delete the URL line. It is preferable to use the DOI, which typically starts with "10.****/...". For instance, in the following information for the .bib file, please remove the URL (and ISSN) line, keeping the DOI line in place.
@article {MR1333035,
AUTHOR = {Wiles, A.},
TITLE = {Modular elliptic curves and {F}ermat's last theorem},
JOURNAL = {Ann. of Math. (2)},
FJOURNAL = {Annals of Mathematics. Second Series},
VOLUME = {141},
YEAR = {1995},
NUMBER = {3},
PAGES = {443--551},
DOI = {10.2307/2118559},
URL = {https://doi.org/10.2307/2118559},
ISSN = {0003-486X},
MRCLASS = {11G05 (11D41 11F11 11F80 11G18)},
MRNUMBER = {1333035},
MRREVIEWER = {Karl Rubin}}
• For preprints, use the following template in the .bib file:
@misc{MP,
AUTHOR = {Madhava, I. and Pingala, A.},
EPRINT = {0201.00000},
EPRINTTYPE = {arxiv},
TITLE = {Title of the arXiv preprint},
YEAR = {0002}}
(Do not use @article, but @misc. Use EPRINT etc. if there is an arXiv identifier).
• Author names: All first names should be (edited to become) initials, and never followed by a comma. Usually, it is: Lastname1, F1. and Lastname2, F2. and... While this may not have been the case in the "sample files" created in the past, please manually edit in your .bib file all first names, and keep only their initials intact. Or rather, edit all pre last-names, such as Serre, J.-P.
• Just to remind you: the total length of each FPSAC submission can be no more than 12 pages, with no alterations to the preamble in the TeX file (font size, margins, etc.).

### Guidelines for Initial Submissions

Accepted extended abstracts will be published in a proceedings volume of Séminaire Lotharingien Combinatoire. Authors will retain the right to publish a full version of their work in another journal, provided that the conference contribution is indicated as an extended abstract of the full version.

For each submission, you must indicate which author will present the work.  A change of presenter will only be possible after advance consultation with the program committee. Each person may be the presenter (i.e., correspondent author) for at most one submission. Program committee members may co-author a paper submitted to the conference, but should not submit the paper themselves, and must recuse themselves from any decisions involving the paper.

Authors should indicate any potential conflict of interest that may exist with program committee members in the submission form.

You have a conflict of interest if a program committee member:

• is at the same institution as an author
• has been in a supervisory/supervisee role in the past
• has been a co-author in the last 5 years or is currently collaborating with an author

As is tradition, there will be a prize for the best student paper. In order to qualify for this prize, all authors on the qualifying submission must be students at the time of submission. You will be asked on the submissions website if your submission qualifies, so please remember to indicate this if it does.

As for the scientific content of the work, the originality of the results and the clarity of exposition will be the primary criteria used to determine which submissions will be accepted.

### Formatting requirements and submission procedures

In order to prepare your submission, please take the following steps to format your document according to these specifications. Please prepare your document using standard LaTeX. If you have any user macros, you must include them in your submission.

• Compile sample.tex using your favourite editor (if compiling from the command line you may need pdflatex) and make sure the output matches intended output file. Note that you must generate a PDF file - dvi or ps files will not be accepted.
• use \documentclass[submission]{FPSAC2022} for your initial submission;
• do not make any changes to font size, page size, layout, etc;
• include your title in the usual way, ie. \title[optional short title]{long title};
• include the author(s) in the usual way, ie. \author[optional shorter names]{longer names};
• use \thanks{…} to include the contact details of author(s), and \addressmark{1}, \addressmark{2}  etc. to include the institution(s) of the author(s), and then use \address{\addressmark{1}…} to match author(s) to institution(s);
• use \received{date} to include your date of submission (don’t cheat!);
• use \abstract{…} to include your English language abstract. Please do not include any citations in your abstract with \cite{…}. If you need to cite something in your abstract then write it out, as (author year). Also, do not include any custom commands in your abstract;
• if you wish to include a second-language abstract then you can do this with the \resume{…} command. If you do not wish to include a second-language abstract then you can just comment this command out;
• by default the second-language abstract will have the title "Abstract". If you want another word like "Saar", "Résumé" or "Zusammenfassung" then you can use the \resumetitle{...} command. Otherwise just comment this command out;
• include 3-6 keywords with the \keywords{…} command;
• the \maketitle command after \begin{document} will generate your title, abstract and keywords automatically.
• The FPSAC2022.cls file loads the graphicx package, and so you should be able to include figures with the usual

%figure code
\begin{figure}
\centering
\includegraphics[width=0.5\textwidth]{plot}
\caption{A plot of a function.}
\label{fig:plot}
\end{figure}

• The FPSAC2022.cls file loads the AMS packages amsmath, amsthm and amssymb. If you wish to load other packages then you must use the usual \includepackage{…} command in the preamble.
• For the final submissions it will be required to include your bibliography as a separate .bib file rather than using \bibitem{…} commands at the end of the document. This will make life much easier for the editor, as it simplifies the process of making bibliographies consistent. The sample.tex file uses the biblatex package, where the commands

%preamble code
\usepackage[backend=bibtex]{biblatex}
\addbibresource{sample.bib}

are included in the preamble, and then \printbibliography is used at the end of the document. (This may require installation of the biber package or the texlive-bibtex-extra package (Ubuntu) if you don’t already have it. See below if you are having compile problems). Alternatively, if you wish you can remove these commands and use something like

%bibliography code
\bibliographystyle{plain}
\bibliography{sample}

at the end of the document. Please use numerical citations in the text, ie. [xx, yy].
• If you are having trouble compiling sample.tex, make sure your LaTeX distribution is up to date:
• On a Mac you are probably using MacTeX, so you can run "tlmgr update --all” in the Terminal, or use the TeX Live Utility app in/Applications/TeX.
• On Windows you are probably using MiKTeX, so you can use the MiKTeX Update Wizard in the Start menu.
• On Linux you should use your package manager to keep things up to date (your version of LaTeX is probably a variant of TeX Live). Depending on your version of Linux you may also be able to use the "tlmgr update --all” command. To use biblatex you may need to install the separate texlive-bibtex-extra package.
• As noted above, you may also need the biber package to get biblatex working (on any system).
• If you are missing the lipsum package needed to generate the Latin text, include the lipsum style file in the directory containing your tex files.
• If problems persist then you should email the proceedings editor Travis Scrimshaw.
• In your initial submission, you must include either a single PDF file of your manuscript, compiled with FPSAC2022.cls, or a zipped (.zip file) containing all necessary files needed to compile your manuscript (including the FPSAC2022.cls file, all figures, the source .tex file and .bib files etc.). Do not alter the font size, font, or the margin sizes in the FPSAC2022.cls file. If your submission is accepted, all source files will be requested.
• All submissions must use 12pt font, the default font for the above class file, and be 6-12 pages in length, including the bibliography. Submissions that exceed the length restriction, use a different font, or have altered margins will not be accepted.

### Submit through Softconf

Please follow the link to the SoftConf website to make your submission. You will need to indicate the presenter name and also if the paper qualifies for consideration for the “best student paper” prize.

## Schedule

The complete brochure is available here. The videos for all talks are available on the FPSAC 2022 playlist. The preliminary version of the published extended abstracts are available here.

The list of accepted talks and posters is below. Presenters are marked with an asterisk.

## Posters

Mockingbird lattices
Samuele Giraudo*

Continuously Increasing Subsequences of Random Multiset Permutations
Alexander Clifton, Bishal Deb*, Yifeng Huang, Sam Spiro and Semin Yoo

Row-strict dual immaculate functions and 0-Hecke modules
Elizabeth Niese, Sheila Sundaram*, Stephanie van Willigenburg, Julianne Vega and Shiyun Wang

Homomorphism complexes, reconfiguration, and homotopy for directed graphs
Anton Dochtermann and Anurag Singh*

Stable sets in flag spheres
Maria Chudnovsky and Eran Nevo*

An involution on derangements preserving excedances and right-to-left minima
Per Wilhelm Alexandersson and Frether Getachew Kebede*

Peaks are Preserved under Run-Sorting

Troupes, Cumulants, and Stack-Sorting
Colin Defant*

Equidistributions around special kinds of descents and excedances via continued fractions
Bin Han*, Jianxi Mao and Jiang Zeng

Combinatorics of Newell-Littlewood numbers
Shiliang Gao, Gidon Orelowitz*, Nicolas Ressayre and Alexander Yong

Wronskians, total positivity, and real Schubert calculus
Steven Karp*

Parity biases in partitions and restricted partitions
Koustav Banerjee, Sreerupa Bhatttacharjee, Manosij Ghosh Dastidar, Pankaj Jyoti Mahanta* and Manjil Saikia

Set partitions, fermions, and skein relations

A statistic for regions of braid deformations
Priyavrat Deshpande* and Krishna Menon

Flag Hilbert--Poincar\'e series and Igusa zeta functions of hyperplane arrangements
Joshua Maglione* and Christopher Voll

Inequality of a class of near-ribbon skew Schur Q functions
Maria Gillespie and Kyle Salois*

Classifying Levi-spherical Schubert varieties
Yibo Gao, Reuven Hodges* and Alexander Yong

Asymptotics of coefficients of algebraic series via embedding into rational series (extended abstract)
Torin Greenwood*, Stephen Melczer, Tiadora Ruza and Mark C. Wilson

Friezes for a Pair of Pants
Ilke Canakci, Anna Felikson, Ana Garcia Elsener* and Pavel Tumarkin

Affine semigroups of maximal projective dimension
Om Prakash Bhardwaj*, Kriti Goel and Indranath Sengupta

A combinatorial model for the transition matrix between the Specht and web bases
Jihyeug Jang*, Byung-Hak Hwang and Jaeseong Oh

Set Partitions, Tableaux, and Subspace Profiles of Regular Diagonal Operators

$0$-Hecke-Clifford modules from diagrams
Dominic Searles*

Factorization of classical characters twisted by roots of unity: extended abstract
Arvind Ayyer and Nishu Kumari*

Rowmotion on fences
Sergi Elizalde, Matthew Plante, Tom Roby* and Bruce Sagan

Positive Tropical Flags and the Positive Tropical Dressian
Jonathan Boretsky*

Grothendieck-to-Lascoux expansions
Tianyi Yu* and Mark Shimozono

Castelnuovo-Mumford Regularity of Matrix Schubert Varieties
Oliver Pechenik, David E. Speyer and Anna Weigandt*

New companions to Gordon identities from commutative algebra
Pooneh Afsharijoo*, Jehanne Dousse, Frédéric Jouhet and Hussein Mourtada

Rooted Clusters for Graph LP Algebras
Esther Banaian, Sunita Chepuri, Elizabeth Kelley* and Sylvester W. Zhang

Subdivisions of generalized permutahedra
Jorge Olarte*, Michael Joswig, Georg Loho and Dante Luber

Horizontal-strip LLT polynomials
Foster Tom*

Harmonic Polynomials on Perfect Matchings
Yuval Filmus and Nathan Lindzey*

Crystals and integrable systems for edge labeled tableaux
Ajeeth Gunna* and Travis Scrimshaw

Parabolic Tamari Lattices in Linear Type B
Wenjie Fang, Henri Mühle* and Jean-Christophe Novelli

Shuffle Lattices and Bubble Lattices
Thomas McConville* and Henri Mühle

Multiplication theorems for self-conjugate partitions
David Wahiche*

The monopole-dimer model for Cartesian products of graphs: extended abstract
Anita Arora* and Arvind Ayyer

Acyclic reorientation lattices and their lattice quotients
Vincent Pilaud*

On the geometry of flag Hilbert--Poincar\'e series for matroids
Lukas Kühne* and Joshua Maglione

Highest weight crystals for Schur Q-functions
Eric Marberg and Kam Hung Tong*

Cluster Duality for Lagrangian and Orthogonal Grassmannians
Charles Wang*

Deformation cones of hypergraphic polytopes
Arnau Padrol, Vincent Pilaud and Germain Poullot*

Cyclic Actions in Parking Spaces
Eric Nathan Stucky*

Lattice paths and negatively indexed weight-dependent binomial coefficients
Josef Küstner, Michael Schlosser* and Meesue Yoo

A q-deformation of enriched P-partitions
Darij Grinberg* and Ekaterina Vassilieva

Growth of unbounded sets in nilpotent groups and random mapping statistics
Beeri Greenfeld and Hagai Lavner*

Derangements and the p-adic incomplete gamma function
Andrew O'Desky and Harry Richman*

Product-Coproduct Prographs and Triangulations of the Sphere
Nicolas Borie* and Justine Falque

Combinatorics of fighting fish, planar maps and Tamari intervals
Corentin Henriet* and Enrica Duchi

Torsors from toggling independent sets
Colin Defant, Michael Joseph, Matthew Macauley and Alex McDonough*

## Contributed talks

Enumeration of walks with small steps avoiding a quadrant
Andrew Elvey Price*

Triangulations, Order Polytopes, and Generalized Snake Posets
Matias von Bell, Benjamin Braun, Derek Hanely, Khrystyna Serhiyenko, Julianne Vega, Andrés R. Vindas Meléndez* and Martha Yip

Log-concave poset inequalities: extended abstract
Swee Hong Chan* and Igor Pak

On the action of the long cycle on the Kazhdan-Lusztig basis
Fern Gossow* and Oded Yacobi

A Type B analog of the Whitehouse representation
Sarah Brauner*

Generalized quantum Yang-Baxter moves and its application to Schubert calculus
Takafumi Kouno*, Cristian Lenart and Satoshi Naito

Semidistrim Lattices
Colin Defant and Nathan Williams*

Multigrounded-partitions and character formulas
Isaac Konan* and Jehanne Dousse

The m=2 amplituhedron and the hypersimplex
Matteo Parisi, Melissa Sherman-Bennett* and Lauren K. Williams

The canonical complex of the weak order
Doriann Albertin* and Vincent Pilaud

Bruhat intervals, subword complexes and brick polyhedra for finite Coxeter groups
Dennis Jahn* and Christian Stump

Rank Polynomials of Fence Posets are Unimodal
Mohan Ravichandran* and Ezgi Kantarci Oguz

Blowup polynomials and delta-matroids of graphs
Projesh Choudhury* and Apoorva Khare

Vertex Spanning Planar Laman Graphs in Triangulated Surfaces
Eran Nevo* and Simion Tarabykin

Rational Ehrhart Theory
Matthias Beck, Sophia Elia and Sophie Rehberg*

Peaks of cylindric plane partitions
Dan Betea* and Alessandra Occelli

Tournaments and slide rules for products of $\psi$ and $\omega$ classes on $\overline{M}_{0,n}$
Maria Gillespie, Sean Griffin* and Jake Levinson

Biclosed sets in affine root systems
Grant Barkley* and David Speyer

A web basis of invariant polynomials from noncrossing partitions
Rebecca Patrias*, Oliver Pechenik and Jessica Striker

A Pattern Avoidance Characterization for Smoothness of Positroid Varieties
Sara Billey and Jordan Weaver*

Soliton cellular automata for the affine general linear Lie superalgebra
Mitchell Ryan and Benjamin Solomon*

There is a Unique Planar-Consistent Sandpile Torsor Algorithm Structure
Alex McDonough* and Ankan Ganguly

Enumeration of corner polyhedra and 3-connected Schnyder labelings
Erkan Narmanli*, Eric Fusy and Gilles Schaeffer

Promotion of Kreweras words
Martin Rubey* and Samuel Hopkins

Higher Lie characters and cyclic descent extension on conjugacy classes
Ron Adin, Pál Hegedüs and Yuval Roichman*

Bumpless pipe dreams encode Gröbner geometry of Schubert polynomials
Patricia Klein* and Anna Weigandt

## Software submissions

Computing Galois groups of Ehrhart polynomials in OSCAR
Claus Fieker, Tommy Hofmann* and Michael Joswig