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7.5.10.0. makeUsl2
Procedure from library ncalg.lib (see ncalg_lib).
- Usage:
- makeUsl2([p]), p an optional integer (field characteristic)
- Return:
- ring
- Purpose:
- set up the U(sl_2) in the variables e,f,h over the field of char p
- Note:
- activate this ring with the
setring command
Example:
| | LIB "ncalg.lib";
def a=makeUsl2();
setring a;
a;
==> // coefficients: QQ considered as a field
==> // 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
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See also:
makeUg2;
makeUgl;
makeUsl.
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