| #### D.13.2.23 getLinearForms Procedure from library `gfan.lib` (see gfan_lib). Usage: getLinearForms(c); c cone getLinearForms(p); p polytope Return: bigintmat, linear forms previously stored in c resp p Example:
    LIB "gfan.lib";
    intmat M[2][3]=
    -1,0,0,
    0,-1,0;
    cone c=coneViaPoints(M);
    getLinearForms(c);
    ==>
    intvec v=1,1,1;
    setLinearForms(c,v);
    getLinearForms(c);
    ==> 1,1,1

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