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Formal: one shared finite-matrix and skew-algebra kit (LEAN-1) - #156
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…echanics (#99) helmholtz_ao_ness.lean now imports geometric_mechanics and re-exports the shared kit (dot, mulVec, mulOf, traceOf, SkewSymmetric, SymmetricOf and the four lemmas) so FEP.HelmholtzAoNess.<name> still resolves. Regenerated projections; theorem total 1946 -> 1942, helmholtz module 26 -> 22.
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Closes #99.
helmholtz_ao_ness.leanduplicateddot,mulVec,mulOf,traceOf,SkewSymmetric,SymmetricOfand four lemmas fromgeometric_mechanics.lean. The kit now lives only inFEP.GeometricMechanics.helmholtz_ao_nessimports it (no cycle) and re-exports all ten names withexport, so every qualified consumer still resolves unchanged: relation YAML, the fep-160 body, topics, coverage.lake --wfail build FepSketchespasses (8,997 jobs, zero warnings), and#print axiomsshows only the standard three.--checks,theorem_ref_audit,check_orphan_compiles,check_render_log --verify-receipt, formal and methods tests, and ruff pass.Matrix. The consumers use plainFin n → Fin n → ℝforms.