"></a>Basic functions</h6><div class="odoc-spec"><div class="spec value anchored" id="val-inv"><a href="#val-inv" class="anchor"></a><code><span><span class="keyword">val</span> inv : <span><a href="#type-mat">mat</a> <span class="arrow">&#45;&gt;</span></span> <a href="#type-mat">mat</a></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-det"><a href="#val-det" class="anchor"></a><code><span><span class="keyword">val</span> det : <span><a href="#type-mat">mat</a> <span