Mathlib v3 is deprecated. Go to Mathlib v4

Commit 2022-12-17 09:24 c2337ec8

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chore(number_theory/divisors): golf (#17954)

  • Upgrade nat.swap_mem_divisors_antidiagonal to a simp iff lemma.
  • Use (equiv.prod_comm _ _).to_embedding instead of ⟨prod.swap, _⟩.
  • Golf.

Estimated changes