Theorems · Theorem · order theory
Finset.union_self
∀ {α : Type u_1} [inst : DecidableEq α] (s : Finset α), s ∪ s = s- Defined in
- Mathlib.Data.Finset.Lattice.Basic
- Cited by
- 0 results in Mathlib
- Foundations
- Depth 58 from the axioms · uses propext, Classical.choice, Quot.sound
- Assumes
- DecidableEq
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- Finsetstatement and proof · cited by 13,712
- Finset.union_idempotentproof · cited by 11
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