Volume 15, Issue 4 Eric Evert The Arveson boundary of a free quadrilateral is given by a noncommutative variety Downloads Abstract PDF Full article PDF DOI { copied = true; setTimeout(() => copied = false, 2000) })" :aria-label="copied ? 'DOI copied' : 'Copy DOI'" :title="copied ? 'Copied' : 'Copy DOI'" > Find all available articles from these authors Eric Evert Find more articles with the same keywords matrix convex set extreme point Arveson boundary linear matrix inequality (LMI) spectrahedron free linear programming Find more articles with the same subject classes 47L07 46L07 90C05