<spanid="the-c-cosmolib-module"></span><h1>the C cosmolib module<aclass="headerlink"href="#module-pNbody.cosmolib"title="Permalink to this headline">¶</a></h1>
<dlclass="function">
<dtid="pNbody.cosmolib.Age_a">
<ttclass="descclassname">pNbody.cosmolib.</tt><ttclass="descname">Age_a</tt><big>(</big><big>)</big><aclass="headerlink"href="#pNbody.cosmolib.Age_a"title="Permalink to this definition">¶</a></dt>
<dd><p>Return age of the univers as a function of a (expansion factor).</p>