| ##### 7.7.8.0. lpIsSemiPrime Procedure from library `fpaprops.lib` (see fpaprops_lib). Usage: lpIsSemiPrime(G); G an ideal in a Letterplace ring Return: boolean Purpose: Check whether R/<G> is semi prime, where R is the basering Assume: - basering is a Letterplace ring - G is a Groebner basis Example:
    LIB "fpaprops.lib";
    ring r = 0,(x1,x2),dp;
    def R = makeLetterplaceRing(5);
    setring R;
    ideal G = x1(1)*x2(2), x2(1)*x1(2); // K<x1,x2>/<x1*x2,x2*x1> is semi prime
    lpIsSemiPrime(G);
    ==> 1

User manual for Singular version 4-1-1, 2018, generated by texi2html.