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<!DOCTYPE MAN SYSTEM "../../manrev.dtd">
<MAN>
  <LANGUAGE>fr</LANGUAGE>
  <TITLE>invr  </TITLE>
  <TYPE>Scilab Function  </TYPE>
  <DATE>April 1993  </DATE>
  <SHORT_DESCRIPTION name="invr"> inversion d&apos;une matrice rationnelle (ou polynomiale)  </SHORT_DESCRIPTION>
  <CALLING_SEQUENCE>
  <CALLING_SEQUENCE_ITEM>F = invr(H)  </CALLING_SEQUENCE_ITEM>
  </CALLING_SEQUENCE>
  <PARAM>
 <PARAM_INDENT>
  <PARAM_ITEM>
  <PARAM_NAME>H  </PARAM_NAME>
  <PARAM_DESCRIPTION>
  <SP>
    : polynôme ou matrice de polynômes
</SP>
  </PARAM_DESCRIPTION> 
  </PARAM_ITEM>
  <PARAM_ITEM>
  <PARAM_NAME>F  </PARAM_NAME>
  <PARAM_DESCRIPTION>
  <SP>
    : polynôme ou matrice de polynômes
</SP>
  </PARAM_DESCRIPTION> 
  </PARAM_ITEM>
 </PARAM_INDENT>
  </PARAM>
  <DESCRIPTION>
  <P>
    Si <VERB>H</VERB> est une matrice de polynômes ou de fractions rationnelles, <VERB>invr</VERB>
    calcule <VERB>H^(-1)</VERB> avec l&apos;algorithme de Leverrier (voir code de la fonction).
  </P>
  </DESCRIPTION>
  <EXAMPLE><![CDATA[
s=poly(0,'s')
H=[s,s*s+2;1-s,1+s]; invr(H)
[Num,den]=coffg(H);Num/den
H=[1/s,(s+1);1/(s+2),(s+3)/s];invr(H)
 ]]></EXAMPLE>
  <SEE_ALSO>
    <SEE_ALSO_ITEM> <LINK>glever</LINK> </SEE_ALSO_ITEM>     <SEE_ALSO_ITEM> <LINK>coffg</LINK> </SEE_ALSO_ITEM>     <SEE_ALSO_ITEM> <LINK>inv</LINK> </SEE_ALSO_ITEM>
  </SEE_ALSO>
</MAN>
