<blockquote>
<p>Any reason for the name Svec/Smat/SvecIndex? I'm not recognizing the name.</p>
</blockquote>

<p>These correspond to the names in the paper (<a href="https://www.cs.nyu.edu/overton/papers/pdffiles/pdsdp.pdf">https://www.cs.nyu.edu/overton/papers/pdffiles/pdsdp.pdf</a>) that I'm basing this implementation off of. </p>

<blockquote>
<p>Inlining SvecIndex() is probably a good idea, though it requires it to be in the header file.</p>
</blockquote>

<p>Ok, can I just plop it in the header file or do you prefer <code>lin_alg_impl.hpp</code>?</p>

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