Matricial real algebraic geometry,
updated slides.
MTNS 2014, (July 7-11, 2014 in Groningen, Netherlands)
Positive matrix polynomials, slides.
Real Algebraic Geometry With A View Toward Systems Control and Free Positivity, (April 6-12, 2014 in Oberwolfach, Germany)
Matricial real algebraic geometry,
slides.
Emerging Developments in Real Algebraic Geometry: Positivity, Convexity, NC-Geometry, Optimization
(February 20–-24, 2012, Magdeburg, Germany)
Noncommutative real algebraic geometry,
NoMaP 2008, (July 22-26, 2008 in Brussels, Belgium)
Formally real involutions on central simple algebras
slides.
MTNS 2006, (July 24-28, 2006 in Kyoto, Japan)
A brief history of noncommutative Positivstellensatz,
slides.
Cairo Algebras and Coalgebras Conference, (March 25-30, 2006 in Cairo, Egypt)
G-invariant preorderings,
slides.
Annual General Network Conference RAAG2005, (September 5 to 9, 2005 in Passau, Germany)
A representation theorem for archimedean quadratic modules on *-rings,
slides.
Sixth Annual Colloquiumfest, (April 1-2, 2005 in Saskatoon, Canada)
Intersection theorems for quadratic modules on *-rings,
slides.
Conference on Positive Polynomials, (March 14-18, 2005 in Luminy, France)
Higher product levels of skew fields,
slides.
Workshop on K-Theory, Algebraic Groups and Related Structures,
(July 5th-8th 2004 in Dublin, Ireland.)
Orderings and *-orderings on cocommutative Hopf algebras,
slides.
Annual RAAG Network Conference,
(June 22-27 2004 in Salamanca, Spain)
A representation theorem for archimedean quadratic modules on *-rings,
slides.
Network workshop on real algebra (October 23 - 25, 2003 in Dortmund, Germany )