Assistant Professor at UPenn.
31 How undecidable is the spectral gap? dec 12
15 Dual of the Ultraproduct of a Banach Space jan 25 '11
15 What is the proof-theoretic ordinal of PA + Con(PA), PA + Con(PA + Con(PA)) etc., and why? jan 21 '14
13 Consistency of Analysis (second order arithmetic) mar 8 '14
13 Is it possible for P(N) to be larger than Aleph_omega? mar 10 '11