Hsueh-Yung Lin, Motivic Invariants of Birational Automorphisms of Threefolds
B236-1 IBS, Korea, Republic ofSpeaker Hsueh-Yung Lin National Taiwan University The motivic invariant c(f) of a birational automorphism f : X - → X measures the difference between the birational types of the exceptional divisors of f and those of the inverse f-1. In general c(f) is nonzero: this is the case when f is some Cremona …
