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<div><a href="index.html" title="">Macaulay2Doc</a> > <a href="___Copyright_spand_splicense.html" title="">Copyright and license</a></div>
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<div><h1>Copyright and license</h1>
<div><p>Macaulay2, its object code and source code, and its documentation, are copyright by Daniel R. Grayson and Michael E. Stillman. We permit you to use it under the terms of the GNU General Public License, version 2, as published by the Free Software Foundation, and as contained in the file <a href="___C__O__P__Y__I__N__G.html" title="the Macaulay2 license agreement">COPYING</a> accompanying the program.</p>
<p>Some free libraries have been compiled into (or linked with) Macaulay2, and some free programs, or packages of programs, with their libraries, have been compiled and distributed with Macaulay2:</p>
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<div><h3>Menu</h3>
<h4>libraries</h4>
<ul><li><span><a href="___Singular-__Factory.html" title="">Singular-Factory</a></span></li>
<li><span><a href="___Singular-__Libfac.html" title="">Singular-Libfac</a></span></li>
<li><span><a href="_frobby.html" title="">frobby</a></span></li>
<li><span><a href="_pari.html" title="">pari</a></span></li>
<li><span><a href="___M__P__I__R.html" title="">MPIR</a></span></li>
<li><span><a href="___M__P__F__R.html" title="">MPFR</a></span></li>
<li><span><a href="___G__C_spgarbage_spcollector.html" title="">GC garbage collector</a></span></li>
<li><span><a href="___L__A__P__A__C__K.html" title="">LAPACK</a></span></li>
<li><span><a href="___B__L__A__S.html" title="">BLAS</a></span></li>
<li><span><a href="___N__T__L_splibrary.html" title="">NTL library</a></span></li>
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<h4>programs and their libraries</h4>
<ul><li><span><a href="_4ti2.html" title="">4ti2</a></span></li>
<li><span><a href="_gfan.html" title="">gfan</a></span></li>
<li><span><a href="_normaliz.html" title="">normaliz</a></span></li>
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