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<!DOCTYPE MAN SYSTEM "../../manrev.dtd">
<MAN>
  <LANGUAGE>fr</LANGUAGE>
  <TITLE>coffg  </TITLE>
  <TYPE>Scilab Function  </TYPE>
  <DATE>April 1993  </DATE>
  <SHORT_DESCRIPTION name="coffg"> inverse d&apos;une matrice de polynômes  </SHORT_DESCRIPTION>
  <CALLING_SEQUENCE>
  <CALLING_SEQUENCE_ITEM>[Ns,d]=coffg(Fs)   </CALLING_SEQUENCE_ITEM>
  </CALLING_SEQUENCE>
  <PARAM>
 <PARAM_INDENT>
  <PARAM_ITEM>
  <PARAM_NAME>Fs  </PARAM_NAME>
  <PARAM_DESCRIPTION>
  <SP>
    : matrice carrée de polynômes
</SP>
  </PARAM_DESCRIPTION> 
  </PARAM_ITEM>
 </PARAM_INDENT>
  </PARAM>
  <DESCRIPTION>
  <P>
    <VERB>coffg</VERB> calcule <VERB>Fs^-1</VERB> par la méthode des cofacteurs, où <VERB>Fs</VERB> est une matrice de polynômes.
  </P>
  <P>
    inverse de <VERB>Fs</VERB> = <VERB>Ns/d</VERB>
  </P>
  <P>
    <VERB>d</VERB> = dénominateur commun; <VERB>Ns</VERB> = numérateur (une matrice de polynômes).
  </P>
  <P>
    (pour les grandes matrices, s&apos;armer de patience... les résultats sont en général fiables)
  </P>
  </DESCRIPTION>
  <EXAMPLE><![CDATA[
s=poly(0,'s')
a=[ s, s^2+1; s  s^2-1];
[a1,d]=coffg(a);
(a1/d)-inv(a)
 ]]></EXAMPLE>
  <SEE_ALSO>
    <SEE_ALSO_ITEM> <LINK>determ</LINK> </SEE_ALSO_ITEM>     <SEE_ALSO_ITEM> <LINK>detr</LINK> </SEE_ALSO_ITEM>     <SEE_ALSO_ITEM> <LINK>invr</LINK> </SEE_ALSO_ITEM>     <SEE_ALSO_ITEM> <LINK>penlaur</LINK> </SEE_ALSO_ITEM>     <SEE_ALSO_ITEM> <LINK>glever</LINK> </SEE_ALSO_ITEM>
  </SEE_ALSO>
  <AUTHOR>F. D.; ;   </AUTHOR>
</MAN>
