<p dir="auto">The <code class="notranslate">dgemm</code> function does <em>not</em> write the result into <code class="notranslate">c</code> even when using <code class="notranslate">overwrite_c</code>.</p>
<p dir="auto">I think this is a long-standing bug. I found an earlier mention of it here:<br>
<a href="https://mail.scipy.org/pipermail/scipy-user/2008-August/017954.html" rel="nofollow">https://mail.scipy.org/pipermail/scipy-user/2008-August/017954.html</a></p>
<p dir="auto">Turns out the overwrite option, when provided, does not work in all cases. So, it would be nice to clarify that this requires a Fortran array of the right type.</p>