Want to suggest a speaker? Send an email to Mahya Ghandehari.
Seminars will be held on Wednesdays from 10:00 am - 11:00 am in Ewing 336.
Information about the Courtyard Newark - University of Delaware Hotel
|Dr. Der-Chen Chang, Georgetown University||Dr. Der-Chen Chang, Georgetown University||EWG 336||Title: On Heat kernel asymptotic expansions for sub-elliptic operators
In this talk, we shall discuss the heat kernels for some sub-elliptic
operators, especially the Heisenberg sub-Laplacaian and Grushin operators.
Then we shall discuss small time asymptotic expansions and Li-Yau estimates
for the eigenvalues of Dirichlet problem of these operators. ||2/21/2018 3:00:00 PM||2/21/2018 4:00:00 PM||False|
|Dr. Anna Skripka, University of New Mexico ||Dr. Anna Skripka, University of New Mexico ||Ewing 336||Title:A uniqueness property of spectral sum approximations
We will discuss uniqueness of a nonlinear inverse problem arising in
approximation of spectral sums. The main result asserts that Taylor
approximations of a spectral sum of order greater than or equal to two
have vanishing remainders for all monomials if and only if the
respective perturbation is zero. This result complements
non-uniqueness of the first order Taylor remainder. It is obtained by
taking a spline based approach to Taylor remainders and also holds in
a certain infinite dimensional setting. The talk is based on joint
work with M. Zinchenko.
||2/28/2018 3:00:00 PM||2/28/2018 4:00:00 PM||False|
|Dr. Ken Dykema, Texas A&M university ||Dr. Ken Dykema, Texas A&M university ||Ewing 336||Title: Non-closure of a set of quantum correlations
Abstract: Several different models exist for quantum strategies for non-local games,
(e.g., the graph coloring game). Different models correspond to different
sets of correlation matrices. Open questions about these sets of
correlation matrices remain, including some that are equivalent to Connes'
Embedding Conjecture. One set of correlation matrices is the set of those
arising from finite dimensional projections. The question of whether this
set is always closed was solved in the negative by William Slofstra, in
In this talk, we will briefly introduce the theory of quantum strategies
for non-local games and the corresponding sets of correlation matrices, and
we will describe the current state of knowledge about them. Then we will
discuss a newer proof of Slofstra's result, which actually works for games
with fewer inputs and outputs than Slofstra required. This latter result
is joint work with Vern Paulsen and Jitendra Prakash. It relies on some
very nice results about scalar multiples of the identity which are equal to
sums of projections, due to Kruglyak, Rabanovich, Samoilenko. ||3/14/2018 2:00:00 PM||3/14/2018 3:00:00 PM||False|
|Dr. Junshan Lin, Auburn University ||Dr. Junshan Lin, Auburn University ||Ewing 336||TBA||4/18/2018 2:00:00 PM||4/18/2018 3:00:00 PM||False|
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