Singular Manual: nmaxcones

| #### D.13.1.52 nmaxcones Procedure from library `gfan.lib` (see gfan_lib). Usage: nmaxcones(f); f fan Return: int, the number of maximal cones in f Example:
    LIB "gfan.lib";
    fan f=emptyFan(3);
    nmaxcones(f);
    ==> 0
    intmat M1[3][3]=
    1,0,0,
    0,1,0,
    0,0,1;
    cone c1=coneViaPoints(M1);
    insertCone(f,c1);
    nmaxcones(f);
    ==> 1
    intmat M2[2][3]=
    1,0,0,
    0,-1,0;
    cone c2=coneViaPoints(M2);
    insertCone(f,c2);
    nmaxcones(f);
    ==> 2

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