|Topic:||Filtering the Grothendieck ring of varieties|
|Affiliation:||University of Chicago; Member, School of Mathematics|
|Date:||Monday, March 10|
|Time/Room:||2:00pm - 3:00pm/S-101|
The Grothendieck ring of varieties over \(k\) is defined to be the free abelian group generated by varieties over \(k\), modulo the relation \([X] = [Y] + [X \backslash Y]\) for all \(X\) and closed subvarieties \(Y\). Multiplication is induced by cartesian product. Using algebraic K-theory and purely geometric intuition we present a categorification of this ring. This category carries a filtration which does not exist on the ring. This allows us to construct a spectral sequence whose 0th column converges to the Grothendieck ring of varieties and identify the next column.