Some recent conference talks by Ross Willard

• Fields Summer School, "Universal algebra for CSP," Lecture 1 slides, Lecture 2 slides.
• OAL2.0 (June 2011, Krakow), "Relational structures, Maltsev conditions, and CSP," slides (pdf) (229 KB).
• AMS sectional meeting (March 2011, Iowa City), "A new property of finite NU(4) algebras" (with M. Kozik), slides (pdf) (172 KB).
• CP 2010 (St. Andrews, Scotland), "Testing expressibility is hard," slides (pdf) (229 KB).
• BLAST 2010 Tutorial lecture 1 (pdf) (200 KB), lecture 2 (pdf) (204 KB).
• Summer School on Algebra and Ordered Sets (Trest, Czech Republic, 2008), "Universal Algebra and Computational Complexity," a tutorial: slides 1 (pdf) (292 KB); slides 2 (pdf) (308 KB); slides 3 (pdf) (352 KB).
• Workshop on Universal Algebra and the Constraint Satisfaction Problem (Nashville, 2007), "Quick course in universal algebra and tame congruence theory," slides (pdf) (232 KB).
• Order, Algebra, and Logics (Nashville, 2007), "Four unsolved problems in congruence permutable varieties," slides (pdf) (188 KB).