| #### D.13.2.43 containsInCollection Procedure from library `gfan.lib` (see gfan_lib). Usage: containsInCollection(f,c); f fan, c cone Return: 1, if f contains c; 0 otherwise Example:
    LIB "gfan.lib";
    fan f=emptyFan(2);
    intmat M[2][2]=
    1,0,
    0,1;
    cone c=coneViaPoints(M);
    containsInCollection(f,c);
    ==> 0
    insertCone(f,c);
    containsInCollection(f,c);
    ==> 1

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