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7.7.13.0. isCentral
Procedure from library nctools.lib (see nctools_lib).

Usage:
isCentral(p); p poly

Return:
int, 1 if p commutes with all variables and 0 otherwise

Purpose:
check whether p is central in a basering (that is, commutes with every generator of the ring)

Note:
if printlevel > 0, the procedure displays intermediate information (by default, printlevel=0 )

Example:
 


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            User manual for Singular version 3-1-6, Dec 2012, generated by texi2html.