Singular Manual: Source

| #### D.4.17.7 Source Procedure from library `modules.lib` (see modules_lib). Usage: Source(M); M Matrix Return: FreeModule, source of the Matrix Example:
    LIB "modules.lib";
    ring r;
    matrix m[2][2]=x,y3,z,xz;
    Matrix M=m;
    M;
    ==> x,y3,
    ==> z,xz
    ==>
    Source(M);
    ==>  2
    ==> r
    ==> free Module
    ==>

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