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Def sym2.is_diag

Modification history

2021-07-20 18:13
src/data/sym2.lean
feat(data/sym2): add the universal property, and make `sym2.is_diag ⟦(x, y)⟧ ↔ x = y` true definitionally (#8358)
Modified sym2.is_diagView on Github →
2020-07-23 02:51
src/data/sym2.lean
chore(data/sym2) : simplify proofs (#3522) …
Modified sym2.is_diagView on Github →
2020-07-06 16:58
src/data/sym2.lean
feat(data/sym2) Defining the symmetric square (unordered pairs) (#3264) …
Added sym2.is_diagView on Github →