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<html><head><title>[Radiroot] 3 The Info Class of the Package</title></head>
<body text="#000000" bgcolor="#ffffff">
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<h1>3 The Info Class of the Package</h1><p>
<p>
The <code>info</code> mechanism in <font face="Gill Sans,Helvetica,Arial">GAP</font> allows functions to print information
during the computation (see Section <a href="../../../doc/ref/chap7.html#X7A9C902479CB6F7C">Info Functions</a> in the
<font face="Gill Sans,Helvetica,Arial">GAP</font> reference manual for general information).
<p>
<a name = ""></a>
<li><code>InfoRadiroot V</code>
<p>
is the info class of this package.
<p>
<a name = ""></a>
<li><code>SetInfoLevel( InfoRadiroot, </code><var>level</var><code> )</code>
<p>
sets the info level for <code>InfoRadiroot</code> to <var>level</var>, where <var>level</var> has
to be an integer in the range 0-4.
<p>
The default value for <code>InfoRadiroot</code> is 1. Information why a function
returns <code>fail</code> will be given with this setting.
<pre>
gap> InfoLevel(InfoRadiroot);
1
gap> RootsOfPolynomialAsRadicals(x^5-4*x+2);
#I Polynomial is not solvable.
fail
</pre>
<p>
Setting the info level to a higher value will cause messages to show up during
single steps of the computation. On level 2 one gets a rough
overview. Those who want to go into the details of the algorithm
described in <a href="biblio.htm#Distler05"><cite>Distler05</cite></a> and of the implementation itself will
find the information on level 3-4 helpful.
<p>
To use the package in silent mode the info level can be given the
value 0.
<p>
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<P>
<address>Radiroot manual<br>March 2022
</address></body></html>
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