Home Online Manual
Top
Back: isCommutative
Forward: UpOneMatrix
FastBack:
FastForward:
Up: nctools_lib
Top: Singular Manual
Contents: Table of Contents
Index: Index
About: About this document
7.7.16.0. isWeyl
Procedure from library nctools.lib (see nctools_lib).

Usage:
isWeyl();

Return:
int, 1 if basering is a Weyl algebra, or 0 otherwise

Purpose:
check whether basering is a Weyl algebra

Example:
 
LIB "nctools.lib";
ring r = 0,(a,b,c,d),dp;
isWeyl();
==> 0
def D = Weyl(1); setring D; //make from r a Weyl algebra
b*a;
==> ab+1
isWeyl();
==> 1
ring t = 0,(Dx,x,y,Dy),dp;
matrix M[4][4]; M[1,2]=-1; M[3,4]=1;
def T = nc_algebra(1,M); setring T;
isWeyl();
==> 1