| ##### 7.7.15.0. isCommutative Procedure from library `nctools.lib` (see nctools_lib). Usage: isCommutative(); Return: int, 1 if basering is commutative, or 0 otherwise Purpose: check whether basering is commutative Example:
    LIB "nctools.lib";
    ring r = 0,(x,y),dp;
    isCommutative();
    ==> 1
    def D = Weyl(); setring D;
    isCommutative();
    ==> 0
    setring r;
    def R = nc_algebra(1,0); setring R;
    isCommutative();
    ==> 1

User manual for Singular version 4-0-2, 2015, generated by texi2html.