∫ Утверждение Mathlib
fixedBy_one_eq_univ
Mathlib.GroupTheory.GroupAction.FixedPoints
URI: https://scilib.ai/kg/mathlib#MulAction.fixedBy_one_eq_univ
∫ Утверждение Mathlib
Mathlib.GroupTheory.GroupAction.FixedPoints
URI: https://scilib.ai/kg/mathlib#MulAction.fixedBy_one_eq_univ