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Prime numbers, diophantine equations, diophantine approximations, analytic or algebraic number theory, arithmetic geometry, Galois theory, transcendental number theory, continued fractions

5 votes

Prime numbers and limit ordinals

You can encode using recursive functions fairly large ordinals. But you are trying a bit too hard, I think, to encode $\omega^2$. Perhaps a simpler method would be as follows: Let $\pi$ be a bijectio …
Asaf Karagila's user avatar
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12 votes
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The partial preorder on $\mathbb N$ generated by the finite axioms of choice

In Jech's "The Axiom of Choice", at the end of Chapter 7, he formulates the following condition on two natural numbers $n>m$: (S) There is no decomposition of $n$ into $p_1+\ldots+p_s=n$ such that …
Asaf Karagila's user avatar
  • 39.8k