Theorem isCusp_iff_of_relindex_ne_zero

Modification history

2025-09-13 17:16
Mathlib/NumberTheory/ModularForms/Cusps.lean
chore(GroupTheory/Index): rename `relindex` to `relIndex` (#19872) …
Deleted isCusp_iff_of_relindex_ne_zeroView on Github →
2025-09-13 14:08
Mathlib/NumberTheory/ModularForms/Cusps.lean
feat(NumberTheory/ModularForms): Cusps of subgroups acting on upper half-plane (#29327) …
Added isCusp_iff_of_relindex_ne_zeroView on Github →