|  |  7.5.19.0. isCommutative Procedure from librarynctools.lib(see  nctools_lib).
 
Example:Usage:
isCommutative();
Return:
int, 1 if basering is commutative, or 0 otherwise
Purpose:
check whether basering is commutative
 |  | 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
 | 
 
 |