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D.15.7.33 grneg
Procedure from librarygradedModules.lib (see gradedModules_lib).
- Usage:
- grneg(A), graded object A
- Return:
- graded object
- Purpose:
- graded map defined by -A
LIB "gradedModules.lib"; ring r=0,(x,y,z),dp; def A=grobj([x2,yz,xyz],intvec(1,1,0)); grview(A); ==> Graded homomorphism: r(-1)^2 + r <- r(-3), given by a matrix, with degree\ s: ==> .1 ... ==> -- +.. ==> 1 : 2 |.1 ==> 1 : 2 |.2 ==> 0 : 3 |.3 ==> == ==> 3 def F=grneg(A); grview(F); ==> Graded homomorphism: r(-1)^2 + r <- r(-3), given by a matrix, with degree\ s: ==> .1 ... ==> -- +.. ==> 1 : 2 |.1 ==> 1 : 2 |.2 ==> 0 : 3 |.3 ==> == ==> 3 |