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<title>Mathematical Functions - GNU Scientific Library -- Reference Manual</title>
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<h2 class="chapter">4 Mathematical Functions</h2>
<p><a name="index-elementary-functions-61"></a><a name="index-mathematical-functions_002c-elementary-62"></a>
This chapter describes basic mathematical functions. Some of these
functions are present in system libraries, but the alternative versions
given here can be used as a substitute when the system functions are not
available.
<p>The functions and macros described in this chapter are defined in the
header file <samp><span class="file">gsl_math.h</span></samp>.
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