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B.5.0.2 sl2

Procedure from library ncalg.lib (see ncalg_lib).

Usage:
sl2([p]), p an optional integer (field characteristic)

Purpose:
set up the U(sl_2) in the (e,f,h) presentation over the field of char p

Return:
ring

Note:
you have to activate this ring with the 'setring' command

Example:
 
LIB "ncalg.lib";
def a=sl2();
setring a;
a;
==> //   characteristic : 0
==> //   number of vars : 3
==> //        block   1 : ordering dp
==> //                  : names    e f h 
==> //        block   2 : ordering C
==> //   noncommutative relations:
==> //    fe=ef-h
==> //    he=eh+2e
==> //    hf=fh-2f
sl, g2, gl


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            User manual for Singular version 2-1-99, August 2004, generated by texi2html.