SMS scnews item created by Haotian Wu at Sun 12 Mar 2017 2112
Expiry: 11 Sep 2017
Calendar1: 16 Mar 2017 1200-1300
CalLoc1: Carslaw 535A
CalTitle1: Geometry & Topology Seminar: Sasha Fish -- On the values of quadratic forms on difference sets or on non-periodic Bohr sets
Auth: email@example.com (hawu2800) in SMS-WASM
Geometry & Topology Seminar
On the values of quadratic forms on difference sets or on non-periodic Bohr sets (or what did I do this summer)
Sasha Fish (Sydney)
Thursday 16 March 12:00–13:00 in Carslaw 535A.
Please join us for lunch after the talk!
I will be talking about a recent progress on the following question: Given a quadratic form Q in N variables (of a mixed signature) over the integers, show that the set of values:
1) Q(E-E) for a large set E inside Z^N contains a non-trivial subgroup of the integers.
2) Q(B) = Q(Z^N) for any non-periodic Bohr set B in Z^N.
Some parts of the talk are based on the joint work (in progress) with Kamil Bulinski (Sydney).