September 22 
NO SEMINAR (organizational meeting) 
September 29 
NO SEMINAR 
October 6 
NO SEMINAR (preempted by RTG colloquium) 
October 13 
Benedict Gross (UCSD) This is the continuation of last week's RTG colloquium lecture. 
October 20 
NO SEMINAR 
October 27 
Jinhyun Park (KAIST) In the theory of "motives", algebraic cycles are central objects. For instance, the socalled "motivic cohomology", that give the universal bigraded ordinary cohomology on smooth varieties, are obtained from a complex of abelian groups consisting of certain algebraic cycles. In this talk, we discuss how one can go beyond it, and we show that an infinitesimal version of the above complex of abelian groups of algebraic cycles can be identified with the big de RhamWitt complexes after a suitable Zariski sheafification. This in a sense implies that the crystalline cohomology theory admits a description in terms of algebraic cycles, going back to a result of S. Bloch and L. Illusie in the 1970s. This is based on a joint work with Amalendu Krishna. 
November 3 
TBA

November 10 
TBA

November 17 
Rufei Ren (UC Irvine)

November 24 
NO SEMINAR (Thanksgiving) 
December 1 
Vlad Matei (Wisconsin)
