| #### D.13.2.13 containsRelatively Procedure from library `gfan.lib` (see gfan_lib). Usage: containsRelatively(c,p); c cone, p intvec/bigintmat Return: 1 iff the given cone contains the given point in its relative interior; 0 otherwise Example:
    LIB "gfan.lib";
    intmat M[2][2]=
    1,0,
    0,1;
    cone c=coneViaPoints(M);
    intvec p1=1,1;
    containsRelatively(c,p1);
    ==> 1
    intvec p2=0,1;
    containsRelatively(c,p2);
    ==> 0

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