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D.15.13.11 isGradedRingHomomorphism

Procedure from library multigrading.lib (see multigrading_lib).

Usage:
isGradedRingHomomorphism(R, f, A); ring R, ideal f, group homomorphism A

Purpose:
test a multigraded group ring homomorphism defined by a ring map from R to the current ring, given by generators images f and a group homomorphism A between grading groups

Return:
int, 1 for TRUE, 0 otherwise

Example:
 


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