isChainComplex C
tests that the differentials compose to zero.
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The buildin function dual for chainComplexes over the exterior algebra does not return a complex, because the dual of a left module is a right module.
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The object isChainComplex is a method function.
The source of this document is in /build/reproducible-path/macaulay2-1.25.06+ds/M2/Macaulay2/packages/ChainComplexExtras.m2:1533:0.