Theorem CongruenceSubgroup.finiteIndex_conjGL

Modification history

2025-05-24 20:33
Mathlib/NumberTheory/ModularForms/CongruenceSubgroups.lean
feat(NumberTheory/ModularForms): Conjugation by GL(2, Q) preserves congruence subgroups (#24740) …
Added CongruenceSubgroup.finiteIndex_conjGLView on Github →