ApCoCoA-1:NCo.SetX

This article is about a function from ApCoCoA-1.

NCo.SetX

Set alphabet (set of indeterminates) for a free monoid ring.

Syntax

NCo.SetX(X:STRING)

Description

• @param X: a STRING which is the alphabet (set of indeterminates) of a free monoid ring. Every letter in X must have a unique occurrence. The order of letters in X is important since it will induce word orderings. For example,

  NCo.SetX("xyz"); 
  NCo.SetOrdering("LLEX"); 
  

  defines the length-lexicographic ordering induced by x>y>z.

Example

NCo.RingEnv();
Coefficient ring : Q
Ordering : LLEX
-------------------------------
NCo.SetX(<quotes>xyz</quotes>);
NCo.RingEnv();
Coefficient ring : Q
Alphabet : xyz
Ordering : LLEX
-------------------------------

See also

NCo.SetOrdering