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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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