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D.15.6.7 grtwist
Procedure from librarygradedModules.lib (see gradedModules_lib).
- Usage:
- grtwist(a,d), int a, d
- Return:
- graded object representing S(d)^a
- Purpose:
- compute presentation of S(d)^a
LIB "gradedModules.lib"; ring r=32003,(x,y,z),dp; // grview(grpower( grshift(grzero(), 10), 5 ) ); grview( grtwist (5, 10) ); ==> Graded homomorphism: r(10)^5 <- 0, given by zero (5 x 0) matrix. |