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ChainComplexOperations :: wedge2

wedge2 -- exterior square of a chain complex



If tau: F**F \to F**F is the chain map reversing the factors, with appropriate signs, then wedge2 F = image(1-tau) = ker(1+tau) = coker(1+tau)

Ways to use wedge2 :

For the programmer

The object wedge2 is a method function.