Theorem Subgroup.HasDetPlusMinusOne.abs_det

Modification history

2025-09-30 08:44
Mathlib/NumberTheory/ModularForms/ArithmeticSubgroups.lean
feat(NumberTheory/ModularForms): define modular forms for any subgroup of GL(2, R) (#26651) …
Added Subgroup.HasDetPlusMinusOne.abs_detView on Github →