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D.15.10.33 grneg
Procedure from library gradedModules.lib (see gradedModules_lib).
- Usage:
- grneg(A), graded object A
- Return:
- graded object
- Purpose:
- graded map defined by -A
Example:
| | 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
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