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<div class="title">dsdplanczos.h File Reference</div> </div>
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<p>Lanczos procedure determines the maximum step length.
<a href="#details">More...</a></p>
<p><a href="dsdplanczos_8h_source.html">Go to the source code of this file.</a></p>
<table class="memberdecls">
<tr><td colspan="2"><h2><a name="nested-classes"></a>
Data Structures</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="structDSDPLanczosStepLength.html">DSDPLanczosStepLength</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Apply Lanczos prodedure to find distance to boundary. <a href="structDSDPLanczosStepLength.html#details">More...</a><br/></td></tr>
<tr><td colspan="2"><h2><a name="func-members"></a>
Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="dsdplanczos_8h.html#a0db98a9eb4ae08a45498bf56de769636">DSDPFastLanczosSetup</a> (<a class="el" href="structDSDPLanczosStepLength.html">DSDPLanczosStepLength</a> *, <a class="el" href="structSDPConeVec__C.html">SDPConeVec</a>)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Use Lanczos procedure. Assume off tridiagonal entries are zero. <a href="#a0db98a9eb4ae08a45498bf56de769636"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="dsdplanczos_8h.html#a13450b87544302fa3e6ceda031189a7a">DSDPLanczosDestroy</a> (<a class="el" href="structDSDPLanczosStepLength.html">DSDPLanczosStepLength</a> *)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Free data structure. <a href="#a13450b87544302fa3e6ceda031189a7a"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="dsdplanczos_8h.html#a5f6b8919f166ba6149cf12e71b8d3bca">DSDPLanczosInitialize</a> (<a class="el" href="structDSDPLanczosStepLength.html">DSDPLanczosStepLength</a> *)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Initialize Lanczos structure. <a href="#a5f6b8919f166ba6149cf12e71b8d3bca"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="dsdplanczos_8h.html#a9f710224114c584d949d0fe7b4e4529a">DSDPLanczosStepSize</a> (<a class="el" href="structDSDPLanczosStepLength.html">DSDPLanczosStepLength</a> *, <a class="el" href="structSDPConeVec__C.html">SDPConeVec</a>, <a class="el" href="structSDPConeVec__C.html">SDPConeVec</a>, <a class="el" href="structDSDPDualMat__C.html">DSDPDualMat</a>, <a class="el" href="structDSDPDSMat__C.html">DSDPDSMat</a>, double *)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Compute distance to boundary. <a href="#a9f710224114c584d949d0fe7b4e4529a"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="dsdplanczos_8h.html#af016e5b9270f774d081faff7296f0259">DSDPRobustLanczosSetup</a> (<a class="el" href="structDSDPLanczosStepLength.html">DSDPLanczosStepLength</a> *, <a class="el" href="structSDPConeVec__C.html">SDPConeVec</a>)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Use slowerer but more robust method. <a href="#af016e5b9270f774d081faff7296f0259"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="dsdplanczos_8h.html#a94aaca7c5feb571597a089bc7302a021">DSDPSetMaximumLanczosIterations</a> (<a class="el" href="structDSDPLanczosStepLength.html">DSDPLanczosStepLength</a> *LZ, int)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Set parameter. <a href="#a94aaca7c5feb571597a089bc7302a021"></a><br/></td></tr>
</table>
<hr/><a name="details" id="details"></a><h2>Detailed Description</h2>
<div class="textblock"><p>Lanczos procedure determines the maximum step length. </p>
<p>Definition in file <a class="el" href="dsdplanczos_8h_source.html">dsdplanczos.h</a>.</p>
</div><hr/><h2>Function Documentation</h2>
<a class="anchor" id="a0db98a9eb4ae08a45498bf56de769636"></a><!-- doxytag: member="dsdplanczos.h::DSDPFastLanczosSetup" ref="a0db98a9eb4ae08a45498bf56de769636" args="(DSDPLanczosStepLength *, SDPConeVec)" -->
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<td class="memname">int DSDPFastLanczosSetup </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structDSDPLanczosStepLength.html">DSDPLanczosStepLength</a> * </td>
<td class="paramname"><em>LZ</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="structSDPConeVec__C.html">SDPConeVec</a> </td>
<td class="paramname"><em>V</em> </td>
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<td></td>
<td>)</td>
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<div class="memdoc">
<p>Use Lanczos procedure. Assume off tridiagonal entries are zero. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">LZ</td><td>structure. </td></tr>
<tr><td class="paramname">V</td><td>work vector. </td></tr>
</table>
</dd>
</dl>
<p>Definition at line <a class="el" href="dsdpstep_8c_source.html#l00133">133</a> of file <a class="el" href="dsdpstep_8c_source.html">dsdpstep.c</a>.</p>
<p>Referenced by <a class="el" href="sdpconesetup_8c_source.html#l00154">DSDPBlockSetup()</a>.</p>
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<a class="anchor" id="a13450b87544302fa3e6ceda031189a7a"></a><!-- doxytag: member="dsdplanczos.h::DSDPLanczosDestroy" ref="a13450b87544302fa3e6ceda031189a7a" args="(DSDPLanczosStepLength *)" -->
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<td class="memname">int DSDPLanczosDestroy </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structDSDPLanczosStepLength.html">DSDPLanczosStepLength</a> * </td>
<td class="paramname"><em>LZ</em></td><td>)</td>
<td></td>
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</div>
<div class="memdoc">
<p>Free data structure. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">LZ</td><td>structure. </td></tr>
</table>
</dd>
</dl>
<p>Definition at line <a class="el" href="dsdpstep_8c_source.html#l00191">191</a> of file <a class="el" href="dsdpstep_8c_source.html">dsdpstep.c</a>.</p>
<p>Referenced by <a class="el" href="sdpconesetup_8c_source.html#l00305">DSDPBlockTakeDown()</a>.</p>
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<a class="anchor" id="a5f6b8919f166ba6149cf12e71b8d3bca"></a><!-- doxytag: member="dsdplanczos.h::DSDPLanczosInitialize" ref="a5f6b8919f166ba6149cf12e71b8d3bca" args="(DSDPLanczosStepLength *)" -->
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<td class="memname">int DSDPLanczosInitialize </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structDSDPLanczosStepLength.html">DSDPLanczosStepLength</a> * </td>
<td class="paramname"><em>LZ</em></td><td>)</td>
<td></td>
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<div class="memdoc">
<p>Initialize Lanczos structure. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">LZ</td><td>structure. </td></tr>
</table>
</dd>
</dl>
<p>Definition at line <a class="el" href="dsdpstep_8c_source.html#l00092">92</a> of file <a class="el" href="dsdpstep_8c_source.html">dsdpstep.c</a>.</p>
<p>Referenced by <a class="el" href="sdpconesetup_8c_source.html#l00279">DSDPBlockInitialize()</a>, and <a class="el" href="dsdpstep_8c_source.html#l00191">DSDPLanczosDestroy()</a>.</p>
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<a class="anchor" id="a9f710224114c584d949d0fe7b4e4529a"></a><!-- doxytag: member="dsdplanczos.h::DSDPLanczosStepSize" ref="a9f710224114c584d949d0fe7b4e4529a" args="(DSDPLanczosStepLength *, SDPConeVec, SDPConeVec, DSDPDualMat, DSDPDSMat, double *)" -->
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<td class="memname">int DSDPLanczosStepSize </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structDSDPLanczosStepLength.html">DSDPLanczosStepLength</a> * </td>
<td class="paramname"><em>LZ</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="structSDPConeVec__C.html">SDPConeVec</a> </td>
<td class="paramname"><em>W1</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="structSDPConeVec__C.html">SDPConeVec</a> </td>
<td class="paramname"><em>W2</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="structDSDPDualMat__C.html">DSDPDualMat</a> </td>
<td class="paramname"><em>S</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="structDSDPDSMat__C.html">DSDPDSMat</a> </td>
<td class="paramname"><em>DS</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">double * </td>
<td class="paramname"><em>maxstep</em> </td>
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<td></td>
<td>)</td>
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<p>Compute distance to boundary. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">LZ</td><td>structure. </td></tr>
<tr><td class="paramname">W1</td><td>work vector </td></tr>
<tr><td class="paramname">W2</td><td>work vector </td></tr>
<tr><td class="paramname">S</td><td>Current point in factored form. </td></tr>
<tr><td class="paramname">DS</td><td>Step direction. </td></tr>
<tr><td class="paramname">maxstep</td><td>output is distance to boundary. </td></tr>
</table>
</dd>
</dl>
<p>Definition at line <a class="el" href="dsdpstep_8c_source.html#l00247">247</a> of file <a class="el" href="dsdpstep_8c_source.html">dsdpstep.c</a>.</p>
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<a class="anchor" id="af016e5b9270f774d081faff7296f0259"></a><!-- doxytag: member="dsdplanczos.h::DSDPRobustLanczosSetup" ref="af016e5b9270f774d081faff7296f0259" args="(DSDPLanczosStepLength *, SDPConeVec)" -->
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<td class="memname">int DSDPRobustLanczosSetup </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structDSDPLanczosStepLength.html">DSDPLanczosStepLength</a> * </td>
<td class="paramname"><em>LZ</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="structSDPConeVec__C.html">SDPConeVec</a> </td>
<td class="paramname"><em>V</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Use slowerer but more robust method. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">LZ</td><td>structure. </td></tr>
<tr><td class="paramname">V</td><td>work vector. </td></tr>
</table>
</dd>
</dl>
<p>Definition at line <a class="el" href="dsdpstep_8c_source.html#l00163">163</a> of file <a class="el" href="dsdpstep_8c_source.html">dsdpstep.c</a>.</p>
<p>Referenced by <a class="el" href="sdpconesetup_8c_source.html#l00154">DSDPBlockSetup()</a>.</p>
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<a class="anchor" id="a94aaca7c5feb571597a089bc7302a021"></a><!-- doxytag: member="dsdplanczos.h::DSDPSetMaximumLanczosIterations" ref="a94aaca7c5feb571597a089bc7302a021" args="(DSDPLanczosStepLength *LZ, int)" -->
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<td class="memname">int DSDPSetMaximumLanczosIterations </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structDSDPLanczosStepLength.html">DSDPLanczosStepLength</a> * </td>
<td class="paramname"><em>LZ</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>maxlanczos</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
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<div class="memdoc">
<p>Set parameter. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">LZ</td><td>structure. </td></tr>
<tr><td class="paramname">maxlanczos</td><td>a parameter. </td></tr>
</table>
</dd>
</dl>
<p>Definition at line <a class="el" href="dsdpstep_8c_source.html#l00119">119</a> of file <a class="el" href="dsdpstep_8c_source.html">dsdpstep.c</a>.</p>
<p>Referenced by <a class="el" href="sdpconesetup_8c_source.html#l00154">DSDPBlockSetup()</a>.</p>
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