an integer, an upper bound on the number of isolated roots
This method counts the number of points (including multiplicities) in the variety of a chordal network, in case such variety is finite. If the variety is positive dimensional, then the method returns an upper bound on the number of isolated points.
i1 : I = chromaticIdeal(QQ, cycleGraph 10, 2);
o1 : Ideal of QQ[a..j]