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<a name="Sparse-Matrices"></a>
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Next: <a href="Sparse-BLAS-Support.html#Sparse-BLAS-Support" accesskey="n" rel="next">Sparse BLAS Support</a>, Previous: <a href="Basis-Splines.html#Basis-Splines" accesskey="p" rel="previous">Basis Splines</a>, Up: <a href="index.html#Top" accesskey="u" rel="up">Top</a> &nbsp; [<a href="Function-Index.html#Function-Index" title="Index" rel="index">Index</a>]</p>
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<a name="Sparse-Matrices-1"></a>
<h2 class="chapter">41 Sparse Matrices</h2>
<a name="index-sparse-matrices"></a>
<a name="index-matrices_002c-sparse"></a>

<p>This chapter describes functions for the construction and
manipulation of sparse matrices, matrices which are populated
primarily with zeros and contain only a few non-zero elements.
Sparse matrices often appear in the solution of partial
differential equations. It is beneficial to use specialized
data structures and algorithms for storing and working with
sparse matrices, since dense matrix algorithms and structures
can be very slow and use huge amounts of memory when applied
to sparse matrices.
</p>
<p>The header file <samp>gsl_spmatrix.h</samp> contains the prototypes for the
sparse matrix functions and related declarations.
</p>
<table class="menu" border="0" cellspacing="0">
<tr><td align="left" valign="top">&bull; <a href="Sparse-Matrices-Overview.html#Sparse-Matrices-Overview" accesskey="1">Sparse Matrices Overview</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
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<tr><td align="left" valign="top">&bull; <a href="Sparse-Matrices-Allocation.html#Sparse-Matrices-Allocation" accesskey="2">Sparse Matrices Allocation</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
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<tr><td align="left" valign="top">&bull; <a href="Sparse-Matrices-Accessing-Elements.html#Sparse-Matrices-Accessing-Elements" accesskey="3">Sparse Matrices Accessing Elements</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
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<tr><td align="left" valign="top">&bull; <a href="Sparse-Matrices-Initializing-Elements.html#Sparse-Matrices-Initializing-Elements" accesskey="4">Sparse Matrices Initializing Elements</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
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<tr><td align="left" valign="top">&bull; <a href="Sparse-Matrices-Reading-and-Writing.html#Sparse-Matrices-Reading-and-Writing" accesskey="5">Sparse Matrices Reading and Writing</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
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<tr><td align="left" valign="top">&bull; <a href="Sparse-Matrices-Copying.html#Sparse-Matrices-Copying" accesskey="6">Sparse Matrices Copying</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
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<tr><td align="left" valign="top">&bull; <a href="Sparse-Matrices-Exchanging-Rows-and-Columns.html#Sparse-Matrices-Exchanging-Rows-and-Columns" accesskey="7">Sparse Matrices Exchanging Rows and Columns</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
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<tr><td align="left" valign="top">&bull; <a href="Sparse-Matrices-Operations.html#Sparse-Matrices-Operations" accesskey="8">Sparse Matrices Operations</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
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<tr><td align="left" valign="top">&bull; <a href="Sparse-Matrices-Properties.html#Sparse-Matrices-Properties" accesskey="9">Sparse Matrices Properties</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
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<tr><td align="left" valign="top">&bull; <a href="Sparse-Matrices-Conversion-Between-Sparse-and-Dense.html#Sparse-Matrices-Conversion-Between-Sparse-and-Dense">Sparse Matrices Conversion Between Sparse and Dense</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
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<tr><td align="left" valign="top">&bull; <a href="Sparse-Matrices-References-and-Further-Reading.html#Sparse-Matrices-References-and-Further-Reading">Sparse Matrices References and Further Reading</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
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