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D.4.15.23 coker

Procedure from library modules.lib (see modules_lib).

Usage:
coker(M), M a Matrix

Return:
Module, the coker of M

Example:
 
LIB "modules.lib";
ring r;
matrix m[2][2]=x,y2,z,xz;
Matrix M=m;
M;
==>     {1}  {2}
==> {0}   x   y2
==> {0}   z   xz
==> 
coker(M);
==> cokernel | x y2 |
==>          | z xz |
==> 
==> 


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