Difference between revisions of "ApCoCoA-1:LinBox.CharPoly"
From ApCoCoAWiki
m (insert version info) |
|||
| (4 intermediate revisions by 3 users not shown) | |||
| Line 1: | Line 1: | ||
| + | {{Version|1}} | ||
<command> | <command> | ||
<title>LinBox.CharPoly</title> | <title>LinBox.CharPoly</title> | ||
| Line 9: | Line 10: | ||
<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. | <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/> | <par/> | ||
| − | This function returns the characteristic polynomial of <tt>M</tt> in the indeterminate <tt>X</tt> computed by the ApCoCoAServer using LinBox | + | This function returns the characteristic polynomial of <tt>M</tt> in the indeterminate <tt>X</tt> computed by the ApCoCoAServer using functions of the LinBox library. |
<itemize> | <itemize> | ||
| − | <item>@param <em>M</em> A matrix with whose components do not contain the indeterminate X.</item> | + | <item>@param <em>M</em> A matrix with arbitrary entries over the current ring, but whose components do not contain the indeterminate <tt>X</tt>.</item> |
<item>@param <em>X</em> An indeterminate.</item> | <item>@param <em>X</em> An indeterminate.</item> | ||
| − | <item>@return The characteristic polynomial of M in the indeterminate X.</item> | + | <item>@return The characteristic polynomial of <tt>M</tt> in the indeterminate <tt>X</tt>.</item> |
</itemize> | </itemize> | ||
<example> | <example> | ||
| Line 39: | Line 40: | ||
</description> | </description> | ||
| − | <see>Introduction to CoCoAServer</see> | + | <see>ApCoCoA-1:Introduction to CoCoAServer|Introduction to CoCoAServer</see> |
| − | <see>CharPoly</see> | + | <see>ApCoCoA-1:LinAlg.CharPoly|LinAlg.CharPoly</see> |
| + | <see>ApCoCoA-1:CharPoly|CharPoly</see> | ||
<types> | <types> | ||
<type>matrix</type> | <type>matrix</type> | ||
| Line 48: | Line 50: | ||
<key>linbox.CharPoly</key> | <key>linbox.CharPoly</key> | ||
<key>characteristic polynomial</key> | <key>characteristic polynomial</key> | ||
| − | <wiki-category>Package_linbox</wiki-category> | + | <wiki-category>ApCoCoA-1:Package_linbox</wiki-category> |
</command> | </command> | ||
Latest revision as of 10:11, 7 October 2020
| This article is about a function from ApCoCoA-1. |
LinBox.CharPoly
Computes the characteristic polynomial of a matrix.
Syntax
LinBox.CharPoly(M:MAT, X:POLY):LIST
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.
This function returns the characteristic polynomial of M in the indeterminate X computed by the ApCoCoAServer using functions of the LinBox library.
@param M A matrix with arbitrary entries over the current ring, but whose components do not contain the indeterminate X.
@param X An indeterminate.
@return The characteristic polynomial of M in the indeterminate X.
Example
Use R ::= ZZ/(19)[x]; LinBox.CharPoly(BringIn(Mat([[1,2,3],[4,5,6],[7,8,9]])), x); -- CoCoAServer: computing Cpu Time = 0 ------------------------------- x^3 + 4x^2 + x -------------------------------
Example
Use R ::= ZZ[x]; LinBox.CharPoly(Mat([[1,2,3],[4,5,6],[7,8,9]]), x); -- WARNING: Coeffs are not in a field -- GBasis-related computations could fail to terminate or be wrong ------------------------------- -- WARNING: Coeffs are not in a field -- GBasis-related computations could fail to terminate or be wrong -- CoCoAServer: computing Cpu Time = 0 ------------------------------- x^3 - 15x^2 - 18x -------------------------------
