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Sayantan Santra 2024-02-07 16:47:21 -06:00
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Signed by: SinTan1729
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LeanTalkSP24/basics2.lean
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@ -23,9 +23,10 @@ def IsOdd (n : ℕ) : Bool := ¬IsEven n
#eval IsEven 9 #eval IsEven 9
#eval IsOdd 9 #eval IsOdd 9
#eval IsEven 8
#eval IsOdd 8
example {n : ℕ} : IsOdd n = ((n%2) = 1) := by example {n : ℕ} : IsOdd n ↔ ((n%2) = 1) := by
apply iff_iff_eq.mp
constructor constructor
-- <;> -- <;>
· intro h · intro h

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references.md Normal file
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@ -0,0 +1,6 @@
# References
1. [Mathematics in Lean by Patrick Mossad and Jeremy Avigad](https://leanprover-community.github.io/mathematics_in_lean/mathematics_in_lean.pdf)
2. [The Mathlib 4 API docs](https://leanprover-community.github.io/mathlib4_docs/)
3. [The Lean Zulip Chat](https://leanprover.zulipchat.com/)