Singular Manual: intersectionValRingIdeals

| #### D.4.26.14 intersectionValRingIdeals Procedure from library `normaliz.lib` (see normaliz_lib). Usage: intersectionValRingIdeals(intmat V); intersectionValRingIdeals(intmat V, intvec grading); Return: The function returns two ideals, both to be considered as lists of monomials. The first is the system of monomial generators of , the second the system of generators of . The function returns a list consisting of the ideal given by the blocking the computation of Hilbert bases has been activated. However, in this case some numerical invariants are computed, and some other data may be contained in files that you can read into Singular (see showNuminvs, exportNuminvs). Background: Note: The function also gives an error message if the matrix V has the wrong number of columns. Example:
    LIB "normaliz.lib";
    ring R=0,(x,y,z,w),dp;
    intmat V[2][5]=0,1,2,3,4, -1,1,2,1,3;
    intersectionValRingIdeals(V);
See also: diagInvariants; finiteDiagInvariants; intersectionValRings; torusInvariants.

User manual for Singular version 4.3.2, 2023, generated by texi2html.