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单词 GradedTensorProduct
释义

graded tensor product


If A and B are -graded algebrasMathworldPlanetmath, we define the graded tensor product (or super tensor product) AsuB to be the ordinary tensor productPlanetmathPlanetmath as graded modulesMathworldPlanetmath, but with multiplication - called the super productPlanetmathPlanetmath - defined by

(ab)(ab)=(-1)(deg b)(deg a)aabb

where a,a,b,b are homogeneousPlanetmathPlanetmathPlanetmath. The super tensor product of A and B is itself a graded algebra, as we grade the super tensor product of A and B as follows:

(AsuB)n=p,q : p+q=nApBq
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