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<div class="title">dsdpstep.c 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="dsdpstep_8c_source.html">Go to the source code of this file.</a></p>
<table class="memberdecls">
<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="dsdpstep_8c.html#a35e73b100b4385a69d3fb00496dc9dd2">DSDPFastLanczosSetup</a> (<a class="el" href="structDSDPLanczosStepLength.html">DSDPLanczosStepLength</a> *LZ, <a class="el" href="structSDPConeVec__C.html">SDPConeVec</a> V)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Use Lanczos procedure. Assume off tridiagonal entries are zero. <a href="#a35e73b100b4385a69d3fb00496dc9dd2"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="dsdpstep_8c.html#a1a5f06be4c3ba6959de6ae9a76c32a69">DSDPLanczosDestroy</a> (<a class="el" href="structDSDPLanczosStepLength.html">DSDPLanczosStepLength</a> *LZ)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Free data structure. <a href="#a1a5f06be4c3ba6959de6ae9a76c32a69"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="dsdpstep_8c.html#a1186e99d92695e2380ed73eea701c95e">DSDPLanczosInitialize</a> (<a class="el" href="structDSDPLanczosStepLength.html">DSDPLanczosStepLength</a> *LZ)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Initialize Lanczos structure. <a href="#a1186e99d92695e2380ed73eea701c95e"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="dsdpstep_8c.html#a3a47fc7937cf0aba8111ac60767a9ba8">DSDPLanczosStepSize</a> (<a class="el" href="structDSDPLanczosStepLength.html">DSDPLanczosStepLength</a> *LZ, <a class="el" href="structSDPConeVec__C.html">SDPConeVec</a> W1, <a class="el" href="structSDPConeVec__C.html">SDPConeVec</a> W2, <a class="el" href="structDSDPDualMat__C.html">DSDPDualMat</a> S, <a class="el" href="structDSDPDSMat__C.html">DSDPDSMat</a> DS, double *maxstep)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Compute distance to boundary. <a href="#a3a47fc7937cf0aba8111ac60767a9ba8"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="dsdpstep_8c.html#a31f54eb95d3afec9b543db50c32673d3">DSDPRobustLanczosSetup</a> (<a class="el" href="structDSDPLanczosStepLength.html">DSDPLanczosStepLength</a> *LZ, <a class="el" href="structSDPConeVec__C.html">SDPConeVec</a> V)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Use slowerer but more robust method. <a href="#a31f54eb95d3afec9b543db50c32673d3"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="dsdpstep_8c.html#a0a64d376a4373536b179f65b92e7c79a">DSDPSetMaximumLanczosIterations</a> (<a class="el" href="structDSDPLanczosStepLength.html">DSDPLanczosStepLength</a> *LZ, int maxlanczos)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Set parameter. <a href="#a0a64d376a4373536b179f65b92e7c79a"></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="dsdpstep_8c_source.html">dsdpstep.c</a>.</p>
</div><hr/><h2>Function Documentation</h2>
<a class="anchor" id="a35e73b100b4385a69d3fb00496dc9dd2"></a><!-- doxytag: member="dsdpstep.c::DSDPFastLanczosSetup" ref="a35e73b100b4385a69d3fb00496dc9dd2" args="(DSDPLanczosStepLength *LZ, SDPConeVec V)" -->
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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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<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="a1a5f06be4c3ba6959de6ae9a76c32a69"></a><!-- doxytag: member="dsdpstep.c::DSDPLanczosDestroy" ref="a1a5f06be4c3ba6959de6ae9a76c32a69" args="(DSDPLanczosStepLength *LZ)" -->
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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 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="a1186e99d92695e2380ed73eea701c95e"></a><!-- doxytag: member="dsdpstep.c::DSDPLanczosInitialize" ref="a1186e99d92695e2380ed73eea701c95e" args="(DSDPLanczosStepLength *LZ)" -->
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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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<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="a3a47fc7937cf0aba8111ac60767a9ba8"></a><!-- doxytag: member="dsdpstep.c::DSDPLanczosStepSize" ref="a3a47fc7937cf0aba8111ac60767a9ba8" args="(DSDPLanczosStepLength *LZ, SDPConeVec W1, SDPConeVec W2, DSDPDualMat S, DSDPDSMat DS, double *maxstep)" -->
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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>
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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="a31f54eb95d3afec9b543db50c32673d3"></a><!-- doxytag: member="dsdpstep.c::DSDPRobustLanczosSetup" ref="a31f54eb95d3afec9b543db50c32673d3" args="(DSDPLanczosStepLength *LZ, SDPConeVec V)" -->
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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>
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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>
</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="a0a64d376a4373536b179f65b92e7c79a"></a><!-- doxytag: member="dsdpstep.c::DSDPSetMaximumLanczosIterations" ref="a0a64d376a4373536b179f65b92e7c79a" args="(DSDPLanczosStepLength *LZ, int maxlanczos)" -->
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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>
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<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>
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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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