lean-normal-forms

Certified executable Hermite and Smith normal forms in Lean 4, with independently imported rational-canonical and finite-free integer homology applications. Version 1.2.2 realizes the explicit integer matrix complexes as mathlib homological complexes, proves their intrinsic quotient agrees with categorical homology including degree zero, and transports certified decompositions to normalized nondegenerate chains and normalized Moore complexes through a checked simplicial realization witness.