<?xml version="1.0" encoding="UTF-8"?>
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 * pursuant to article 5.3.4 of the CeCILL v.2.1.
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<refentry xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:svg="http://www.w3.org/2000/svg" xmlns:ns5="http://www.w3.org/1999/xhtml" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:db="http://docbook.org/ns/docbook" xmlns:scilab="http://www.scilab.org" xml:id="acoshm" xml:lang="pt">
    <refnamediv>
        <refname>acoshm</refname>
        <refpurpose>arco-cosseno hiperbólico da matriz (matriz arco-cosseno
            hiperbólico)
        </refpurpose>
    </refnamediv>
    <refsynopsisdiv>
        <title>Seqüência de Chamamento</title>
        <synopsis>t=acoshm(x)</synopsis>
    </refsynopsisdiv>
    <refsection>
        <title>Parâmetros</title>
        <variablelist>
            <varlistentry>
                <term>x,t</term>
                <listitem>
                    <para>matriz quadrada de reais ou complexos</para>
                </listitem>
            </varlistentry>
        </variablelist>
    </refsection>
    <refsection>
        <title>Descrição</title>
        <para>acoshm é o arco-cosseno hiperbólico da matriz x (matriz arco-cosseno
            hiperbólico). Usa a fórmula
            <literal>t=logm(x+(x+eye())*sqrtm((x-eye())/(x+eye())))</literal> Para
            matrizes não-simétricas, o resultado pode ser impreciso.
        </para>
    </refsection>
    <refsection>
        <title>Exemplos</title>
        <programlisting role="example"><![CDATA[
A=[1,2;3,4];
coshm(acoshm(A))
A(1,1)=A(1,1)+%i;
coshm(acoshm(A))
 ]]></programlisting>
    </refsection>
    <refsection>
        <title>Ver Também </title>
        <simplelist type="inline">
            <member>
                <link linkend="acosh">acosh</link>
            </member>
            <member>
                <link linkend="logm">logm</link>
            </member>
            <member>
                <link linkend="sqrtm">sqrtm</link>
            </member>
        </simplelist>
    </refsection>
</refentry>
