Returns the digraph associated to a chordal network. The vertices of this digraph are given by the labels of the nodes.
i1 : R = QQ[a,b,c,d,MonomialOrder=>Lex]; |
i2 : I = ideal {a*b, a*c, b*c, c*d}; o2 : Ideal of R |
i3 : N = chordalNet I; |
i4 : chordalTria N; |
i5 : reduceNet N; |
i6 : N o6 = ChordalNet{ a => {a, } } b => {b, , b} c => {c, } d => { , d} o6 : ChordalNet |
i7 : nodes N / (Ni -> label Ni) o7 = {a_0, a_1, b_0, b_1, b_2, c_0, c_1, d_0, d_1} o7 : List |
i8 : digraph N o8 = Digraph{a_0 => {b_0, b_1}} a_1 => {b_2} b_0 => {c_1} b_1 => {c_0} b_2 => {c_0} c_0 => {d_0} c_1 => {d_1} d_0 => {} d_1 => {} o8 : Digraph |