BEGIN:VCALENDAR
PRODID:-//Compnay Inc//Product Application//EN
VERSION:2.0
METHOD:PUBLISH
BEGIN:VEVENT
DTSTART:20260818T103000Z
DTEND:20260818T113000Z
DTSTAMP:20260824T204207Z
UID:aa49cbbf-5203-404c-a3b5-89e6a095aabc
CREATED:20260803T102339Z
X-ALT-DESC;FMTTYPE=text/html:Castle.Proxies.LanguageContentMapProxy
DESCRIPTION:Abstract
A nonnegative polynomial in several real variables need not be a sum of squares of polynomials. Artin showed in 1927 that every such polynomial can nevertheless be written as a sum of squares of rational functions. In free analysis, the situation is strikingly more rigid. Helton proved in 2002 that every scalar-valued noncommutative polynomial positive on all self-adjoint matrix tuples is a sum of squares of noncommutative polynomials, with the optimal degree bound.
In this talk, I wi...
LAST-MODIFIED:20260824T204207Z
LOCATION:Madhava Hall, 3rd Floor, Main Building IISER...
SEQUENCE:0
STATUS:CONFIRMED
SUMMARY:Positivity Certificates in Free Analysis
TRANSP:OPAQUE
END:VEVENT
END:VCALENDAR