Difference between revisions of "ApCoCoA-1:Weyl.IsHolonomic"
From ApCoCoAWiki
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<command> | <command> | ||
<title>Weyl.IsHolonomic</title> | <title>Weyl.IsHolonomic</title> | ||
| − | <short_description>Checks whether an ideal in Weyl algebra | + | <short_description>Checks whether an ideal in Weyl algebra <tt>A_n</tt> is holonomic or not.</short_description> |
<syntax> | <syntax> | ||
Weyl.IsHolonomic(I:IDEAL):BOOL | Weyl.IsHolonomic(I:IDEAL):BOOL | ||
</syntax> | </syntax> | ||
<description> | <description> | ||
| − | + | <em>Please note:</em> The function(s) explained on this page is/are using the <em>ApCoCoAServer</em>. You will have to start the ApCoCoAServer in order to use it/them. | |
| + | <par/> | ||
| + | An ideal <tt>I</tt> is holonomic if it has dimension n, the number of variables in the Weyl algebra <tt>A_n = C[x_1,...,x_n,y_1,...,y_n]</tt> | ||
| + | This function determines whether an ideal I is holonomic by checking its dimension. | ||
| − | An ideal | + | <itemize> |
| − | + | <item>@param <em>I</em> An ideal in the Weyl algebra <tt>A_n</tt>.</item> | |
| + | <item>@return <tt>TRUE</tt> if the given ideal is holonomic.</item> | ||
| + | </itemize> | ||
<example> | <example> | ||
| Line 44: | Line 49: | ||
<types> | <types> | ||
<type>cocoaserver</type> | <type>cocoaserver</type> | ||
| + | <type>ideal</type> | ||
</types> | </types> | ||
| + | |||
<key>weyl.isholonomic</key> | <key>weyl.isholonomic</key> | ||
| + | <key>isholonomic</key> | ||
<wiki-category>Package_weyl</wiki-category> | <wiki-category>Package_weyl</wiki-category> | ||
</command> | </command> | ||
Revision as of 12:15, 23 April 2009
Weyl.IsHolonomic
Checks whether an ideal in Weyl algebra A_n is holonomic or not.
Syntax
Weyl.IsHolonomic(I:IDEAL):BOOL
Description
Please note: The function(s) explained on this page is/are using the ApCoCoAServer. You will have to start the ApCoCoAServer in order to use it/them.
An ideal I is holonomic if it has dimension n, the number of variables in the Weyl algebra A_n = C[x_1,...,x_n,y_1,...,y_n]
This function determines whether an ideal I is holonomic by checking its dimension.
@param I An ideal in the Weyl algebra A_n.
@return TRUE if the given ideal is holonomic.
Example
W3::=ZZ/(7)[x[1..3],d[1..3]]; Use W3; Cpu time = 0.00, User time = 0 ------------------------------- F1:=-d[1]^3d[2]^5d[3]^5+x[2]^5; F2:=-3x[2]d[2]^5d[3]^5+x[2]d[1]^3; F3:=-2d[1]^4d[2]^5-x[1]d[2]^7+x[3]^3d[3]^5; I:=Ideal(F1,F2,F3); Weyl.IsHolonomic(I); -- CoCoAServer: computing Cpu Time = 2.36 ------------------------------- FALSE -------------------------------
Example
A2::=QQ[x[1..2],d[1..2]]; Use A2; ------------------------------- I:=Ideal(x[1]d[1] + 2x[2]d[2] - 5, d[1]^2 - d[2]); ------------------------------- Weyl.IsHolonomic(I); -- CoCoAServer: computing Cpu Time = 0 ------------------------------- TRUE -------------------------------
See also
