Number Theory

Speaker: Adam Chapman
Speaker Info: Tel-Hai College
Brief Description:
Special Note:

The maximal dimension of an anisotropic quadratic form over a given field is an important arithmetic field invariant known as the u-invariant, and is related to the cohomological dimension of the field. We will discuss the computation of the u-invariant in certain cases, and propose a finer invariant that can distinguish fields with identical u-invariant based on the linkage properties of quaternion algebras over the fields. The talk is partially based on joint work with Jean-Pierre Tignol.
Date: Friday, February 21, 2020
Time: 3:00PM
Where: Lunt 107
Contact Person: Bao Le Hung
Contact email: lhvietbao@math.northwestern.edu
Contact Phone:
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