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Theorem
AddSubgroup.relindex_eq_abs_det
Modification history
2025-09-13 17:16
Mathlib/LinearAlgebra/FreeModule/Finite/CardQuotient.lean
chore(GroupTheory/Index): rename `relindex` to `relIndex` (#19872) …
Deleted
AddSubgroup.relindex_eq_abs_det
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2025-03-16 07:15
Mathlib/LinearAlgebra/FreeModule/Finite/CardQuotient.lean
feat(LinearAlgebra/FreeModule/CardQuotient): compute indices of subgroups via determinant (#22940)
Added
AddSubgroup.relindex_eq_abs_det
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