Rat.uniformEmbedding_coe_real
theorem Rat.uniformEmbedding_coe_real : UniformEmbedding Rat.cast
The theorem `Rat.uniformEmbedding_coe_real` states that the function `Rat.cast`, which serves as the canonical homomorphism from the rational numbers (`Rat`) to a division ring `K`, is a uniform embedding. In other words, the mapping from the set of rational numbers to the division ring `K` preserves the uniform structure. This means that nearness of points in the domain (the set of rational numbers) is properly reflected in the nearness of their images in the codomain (the division ring `K`).
More concisely: The `Rat.cast` function from `Rat` to a division ring `K` is a uniform embedding, preserving the uniform structure and ensuring nearness of rational numbers is reflected by nearness of their images in `K`.
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