feat(combinatorics/simple_graph/acyclic): Number of edges of a tree #18638
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YaelDillies
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b-mehta
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semorrison
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@YaelDillies FYI, I'm reviewing this right now by porting it to Lean 4. I'll tag you once I'm done. |
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I lost track of what I did with the first port of this, but here's a port: leanprover-community/mathlib4#5918 Let me know if you need this in mathlib3, and otherwise please close this branch. |
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We do not. This was a one day project with no application in sight. |
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Port/review of [mathlib#18638](leanprover-community/mathlib#18638) directly to Mathlib4. Co-authored-by: Yaël Dillies <yael.dillies@gmail.com> Co-authored-by: Bhavik Mehta <bhavikmehta8@gmail.com>
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Port/review of [mathlib#18638](leanprover-community/mathlib#18638) directly to Mathlib4. Co-authored-by: Yaël Dillies <yael.dillies@gmail.com> Co-authored-by: Bhavik Mehta <bhavikmehta8@gmail.com>
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Port/review of [mathlib#18638](leanprover-community/mathlib#18638) directly to Mathlib4. Co-authored-by: Yaël Dillies <yael.dillies@gmail.com> Co-authored-by: Bhavik Mehta <bhavikmehta8@gmail.com>
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Port/review of [mathlib#18638](leanprover-community/mathlib#18638) directly to Mathlib4. Co-authored-by: Yaël Dillies <yael.dillies@gmail.com> Co-authored-by: Bhavik Mehta <bhavikmehta8@gmail.com>
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Port/review of [mathlib#18638](leanprover-community/mathlib#18638) directly to Mathlib4. Co-authored-by: Yaël Dillies <yael.dillies@gmail.com> Co-authored-by: Bhavik Mehta <bhavikmehta8@gmail.com>
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The number of edges of a tree is one less than the number of vertices.
Co-authored-by: Bhavik Mehta bhavikmehta8@gmail.com