r experience tells us that quadratic forms often pose a numerical challenge for
the underlying solvers that CVX uses.</p>
<p>We acknowledge that this advice goes against conventional wisdom: quadratic forms
are the prototypical smooth convex function, while norms are nonsmooth and therefore
unwieldy. But with the <em>conic</em> solvers that CVX uses, this wisdom is <em>exactly backwards</em>.
It is the <em>norm</em> that is best suited for conic formulation and solution. Quadratic forms
are handled by <em>c