Difference between revisions of "ApCoCoA-1:NCo.SetX"
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Ordering : LLEX | Ordering : LLEX | ||
------------------------------- | ------------------------------- | ||
| − | NCo.SetX( | + | NCo.SetX("xyz"); |
NCo.RingEnv(); | NCo.RingEnv(); | ||
Coefficient ring : Q | Coefficient ring : Q | ||
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Latest revision as of 13:45, 29 October 2020
| 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("xyz");
NCo.RingEnv();
Coefficient ring : Q
Alphabet : xyz
Ordering : LLEX
-------------------------------
See also
