</refnamediv>
<refsynopsisdiv>
<title>Calling Sequence</title>
- <synopsis>[pgcd,U]=gcd(p)</synopsis>
+ <synopsis>[pgcd, U]=gcd(p)</synopsis>
</refsynopsisdiv>
<refsection>
<title>Arguments</title>
<term>p</term>
<listitem>
<para>
- polynomial row vector <literal>p=[p1,..,pn]</literal> or integer row
- vector (type equal to 8)
+ a polynomial row vector <literal>p=[p1, ..., pn]</literal> or
+ an integer row vector (type equal to 8)
</para>
</listitem>
</varlistentry>
<refsection>
<title>Description</title>
<para>
- computes the gcd of components of <literal>p</literal> and a unimodular
- matrix (with polynomial inverse) <literal>U</literal>, with minimal degree such that
+ <code>gcd(p)</code> computes the gcd of components of <varname>p</varname> (<varname>pgcd</varname>) and an
+ unimodular matrix (with polynomial inverse) <varname>U</varname>, with minimal degree such that
</para>
<para>
- <literal>p*U=[0 ... 0 pgcd]</literal>
+ <literal>p*U=[0 ... 0 pgcd]</literal>.
+ </para>
+ <para>
+ In mathematics, an <emphasis role='italic'>unimodular</emphasis> matrix
+ <literal>U</literal> is a square integer matrix having
+ determinant <literal>+1</literal> or <literal>-1</literal>.
</para>
</refsection>
<refsection>