|  |  D.15.20.33 grneg Procedure from librarygradedModules.lib(see  gradedModules_lib).
 
Example: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    
 | 
 
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