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<div class="ChapSects"><a href="chap4_mj.html#X79D98558806BCE54">4 <span class="Heading">Basic functionality for parallel computation</span></a>
<div class="ContSect"><span class="tocline"><span class="nocss"> </span><a href="chap4_mj.html#X835EF64B87BD48C7">4.1 <span class="Heading"> Six Core Functions</span></a>
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<span class="ContSS"><br /><span class="nocss">  </span><a href="chap4_mj.html#X780C7FD2866D6C2B">4.1-1 ChildCreate</a></span>
<span class="ContSS"><br /><span class="nocss">  </span><a href="chap4_mj.html#X780C7FD2866D6C2B">4.1-2 ChildCreate</a></span>
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<h3>4 <span class="Heading">Basic functionality for parallel computation</span></h3>

<p>This page covers the functions used for parallel computation in the book <span class="URL"><a href="https://global.oup.com/academic/product/an-invitation-to-computational-homotopy-9780198832980">An Invitation to Computational Homotopy</a></span>.</p>

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<h4>4.1 <span class="Heading"> Six Core Functions</span></h4>

<p><a id="X780C7FD2866D6C2B" name="X780C7FD2866D6C2B"></a></p>

<h5>4.1-1 ChildCreate</h5>

<div class="func"><table class="func" width="100%"><tr><td class="tdleft"><code class="func">&#an style='color: green'>8227; ChildCreate</code>(  )</td><td class="tdright">( function )</td></tr></table></div>
<div class="func"><table class="func" width="100%"><tr><td class="tdleft"><code class="func">&#an style='color: green'>8227; ChildProcess</code>( <var class="Arg">str</var> )</td><td class="tdright">( function )</td></tr></table></div>
<div class="func"><table class="func" width="100%"><tr><td class="tdleft"><code class="func">&#an style='color: green'>8227; ChildProcess</code>( <var class="Arg">str</var> )</td><td class="tdright">( function )</td></tr></table></div>
<div class="func"><table class="func" width="100%"><tr><td class="tdleft"><code class="func">&#an style='color: green'>8227; ChildProcess</code>( <var class="Arg">str</var> )</td><td class="tdright">( function )</td></tr></table></div>
<p>Starts a GAP session as a child process and returns a stream to the child process. If no argument is given then the child process is created on the local machine; otherwise the argument should be: (1) <span class="SimpleMath">\(str\)</span>="computer.address.ie" the address of a remote computer for which ssh has been configured to require no password from the user; (2) <span class="SimpleMath">\(str\)</span>=["-m", "100000M", "-T"] a list of GAP command line options; (3) <span class="SimpleMath">\(str\)</span>="computer.ac.wales", ["-m", "100000M", "-T"] the address of a computer followed by a list of command line options.</p>

<p><strong class="button">Examples:</strong></p>

<p><a id="X780C7FD2866D6C2B" name="X780C7FD2866D6C2B"></a></p>

<h5>4.1-2 ChildCreate</h5>

<div class="func"><table class="func" width="100%"><tr><td class="tdleft"><code class="func">&#an style='color: green'>8227; ChildCreate</code>(  )</td><td class="tdright">( function )</td></tr></table></div>
<div class="func"><table class="func" width="100%"><tr><td class="tdleft"><code class="func">&#an style='color: green'>8227; ChildProcess</code>( <var class="Arg">str</var> )</td><td class="tdright">( function )</td></tr></table></div>
<div class="func"><table class="func" width="100%"><tr><td class="tdleft"><code class="func">&#an style='color: green'>8227; ChildProcess</code>( <var class="Arg">str</var> )</td><td class="tdright">( function )</td></tr></table></div>
<div class="func"><table class="func" width="100%"><tr><td class="tdleft"><code class="func">&#an style='color: green'>8227; ChildProcess</code>( <var class="Arg">str</var> )</td><td class="tdright">( function )</td></tr></table></div>
<p>Starts a GAP session as a child process and returns a stream to the child process. If no argument is given then the child process is created on the local machine; otherwise the argument should be: (1) <span class="SimpleMath">\(str\)</span>="computer.address.ie" the address of a remote computer for which ssh has been configured to require no password from the user; (2) <span class="SimpleMath">\(str\)</span>=["-m", "100000M", "-T"] a list of GAP command line options; (3) <span class="SimpleMath">\(str\)</span>="computer.ac.wales", ["-m", "100000M", "-T"] the address of a computer followed by a list of command line options.</p>

<p><strong class="button">Examples:</strong></p>


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