Mathlib v3 is deprecated. Go to Mathlib v4

Theorem subgroup.subsingleton_iff

Modification history

2021-08-17 16:30

src/group_theory/subgroup.lean

chore(*): flip various `subsingleton_iff`, `nontrivial_iff` lemmas and add `simp` (#8703)

Modified subgroup.subsingleton_iff View on Github →

2021-01-12 16:10

src/group_theory/subgroup.lean

feat(submonoid/basic): subsingleton and nontrivial instances for {add_,}submonoid (#5690)

Added subgroup.subsingleton_iff View on Github →