ApCoCoA-1:NCo.SetX: Difference between revisions
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New page: <command> <title>NCo.SetX</title> <short_description> Set alphabet (set of indeterminates). </short_description> <syntax> NCo.SetX(X:STRING) </syntax> <description> <itemize> <item>@param ... |
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<command> | <command> | ||
<title>NCo.SetX</title> | <title>NCo.SetX</title> | ||
<short_description> | <short_description> | ||
Set alphabet (set of indeterminates). | Set alphabet (set of indeterminates) for a free monoid ring. | ||
</short_description> | </short_description> | ||
<syntax> | <syntax> | ||
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<description> | <description> | ||
<itemize> | <itemize> | ||
<item>@param <em>X</em>: a STRING which is the alphabet (set of indeterminates) of a free monoid ring. Every letter in <tt>X</tt> must have a unique | <item>@param <em>X</em>: a STRING which is the alphabet (set of indeterminates) of a free monoid ring. Every letter in <tt>X</tt> 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.</item> | |||
</itemize> | </itemize> | ||
<example> | <example> | ||
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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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</description> | </description> | ||
<seealso> | <seealso> | ||
<see>NCo. | <see>ApCoCoA-1:NCo.SetOrdering|NCo.SetOrdering</see> | ||
</seealso> | </seealso> | ||
<types> | <types> | ||
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<key>NCo.SetX</key> | <key>NCo.SetX</key> | ||
<key>SetX</key> | <key>SetX</key> | ||
<wiki-category>Package_gbmr</wiki-category> | <wiki-category>ApCoCoA-1:Package_gbmr</wiki-category> | ||
</command> | </command> | ||
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
