[Merged by Bors] - feat: port SetTheory.ZFC.Basic #3165
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vihdzp
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SetTheory.Zfc.Basic (again)
vihdzp
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Mar 30, 2023
vihdzp
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Mar 30, 2023
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| @[simp] | ||
| theorem unionₛ_pair {x y : ZFSet.{u}} : ⋃₀ ({x, y} : ZFSet.{u}) = x ∪ y := | ||
| rfl |
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The Mathlib 3 proof isn't rfl but could be, I'll fix that at a later time.
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The file has been ported up to SHA 98bbc3526516bca903bff09ea10c4206bf079e6b. I would like for this to be ported before I port any further Mathlib 3 changes. |
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A re-do of #1215, necessary since a lot of major changes have happened in the last months. Co-authored-by: Jeremy Tan Jie Rui <reddeloostw@gmail.com>
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A re-do of #1215, necessary since a lot of major changes have happened in the last months. Co-authored-by: Jeremy Tan Jie Rui <reddeloostw@gmail.com>
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A re-do of leanprover-community#1215, necessary since a lot of major changes have happened in the last months. Co-authored-by: Jeremy Tan Jie Rui <reddeloostw@gmail.com>
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A re-do of #1215, necessary since a lot of major changes have happened in the last months.