Mathlib v3 is deprecated. Go to Mathlib v4

Commit 2019-11-09 19:14 1236ced4

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feat(data/nat/basic): succ_div (#1664)

  • feat(data/nat/basic): succ_div Rather long proof, but it was the best I could do.
  • Update basic.lean
  • add the two lemmas for each case
  • get rid of positivity assumption

Estimated changes