Singular Manual: addModules

| #### D.4.17.27 addModules Procedure from library `modules.lib` (see modules_lib). Usage: addModules(M,N); or M+N; M and N Modules Return: Module, sum of the two Modules Example:
    LIB "modules.lib";
    ring r;
    matrix ma[2][2]=x,y,x2,y2;
    Matrix m=ma;
    Module M=image(m);
    matrix na[2][2]=xy,x2,y2,x;
    Matrix n=na;
    Module N=image(na);
    M;
    ==> image | x  y  |
    ==>       | x2 y2 |
    ==>
    ==>
    N;
    ==> image | xy x2 |
    ==>       | y2 x  |
    ==>
    ==>
    N+M;
    ==> image | xy x2 x  y  |
    ==>       | y2 x  x2 y2 |
    ==>
    ==>

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