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IncidenceAlgebra.mu_eq_neg_sum_Ioc_of_ne
Modification history
2024-11-11 17:57
Mathlib/Combinatorics/Enumerative/IncidenceAlgebra.lean
feat: Incidence algebras (#8900) …
Added
IncidenceAlgebra.mu_eq_neg_sum_Ioc_of_ne
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