Ehsaan Hossain, Department of Pure Mathematics, University of Waterloo
“Polycyclic groups”
Lorenzo Foscolo, Stony Brook University
“New Einstein metrics on the 6-sphere and the product of two 3-spheres, nearly K ̈ahler 6-manifolds and G2 cones”
Charles W. Clark, National Institute of Standards and Technology
“Twisting the neutron wavefunction”
Jonathan Stephenson, Department of Pure Mathematics, University of Waterloo
“The Adjacency Relation”
We will show that the adjacency relation is structurally complete in linear orders, by expressing rice relations in terms of universal sentences over it.
MC 5417
Christopher Hawthorne, Department of Pure Mathematics, University of Waterloo
“Continuous model theory IV”
We begin section 5 of Model theory for metric structures; we present ultraproducts and, time permitting, compactness.
MC 5403
Aaron Tikuisis, University of Aberdeen
“C*-algebras: quasidiagonality and amenability”
Kanstantsin Pashkovich, Combinatorics & Optimization, University of Waterloo
"Four Dimensional Polytopes of Minimum Positive Semidefinite Rank"
For a given polytope the smallest size of a semidefinite extended
formulation can be bounded from below by the dimension of the polytope
plus one. This talk is about polytopes for which this bound is tight,
i.e. polytopes with positive semidefinite (psd) rank equal to their
dimension plus one.
Nickolas Rollick, Department of Pure Mathematics, University of Waterloo
“The grand scheme of things”
Edward Lee and Ilia Chtcherbakov, University of Waterloo
“Topos Theory VI”
We finish off chapter 6 of Goldblatt: we discuss logical semantics in the context of an arbitrary topos. We then begin chapter 5: we see some first categorical properties of topoi.
MC 5403
**Please note change of time**
Michael Wan, University of California, Berkeley
“Towards a model theory of almost complex manifolds”