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Universal Algebra seminar
Matt Valeriote, McMaster University
"Characterizing congruence n-permutability"
Analysis seminar
Alexey Popov, Department of Pure Mathematics, University of Waterloo
“On the spatial structure of semigroups of partial isometries.”
It is a well-known fact that if a group of matrices is bounded, then it is simultaneously similar to a group of unitaries. We will start this talk by discussing a semigroup analogue of this statement (a set of operators is called a semigroup if it is closed under multiplication).Pure Math colloquium
Spyros Alexakis, University of Toronto
“The black hole uniqueness problem, old and new.”
We address the uniqueness question of vacuum stationary black hole solutions of Einstein’s equations in general relativity, and discuss its relevance towards understanding the possible final states of evolving black holes. We present older and newer results (joint with A. Ionescu and S. Klainer- man) towards settling the uniqueness question.
Model Theory seminar
Omar Leon Sanchez, Department of Pure Mathematics, University of Waterloo
"NIP Theories IV"
We will see some examples of NIP theories and prove the Baldwin-Saxl theorem. Time permitting we will talk about invariant types.Joint graduate student seminar - Pure Mathematics/Combinatorics & Optimization
Speakers:
Ian Payne - Pure Mathematics
Georg Osang - Combinatorics & Optimization
Geometry & Topology seminar
Xiaowei Wang, Rutgers University Newark
“Greatest Ricci curvature lower bounds and conic K ̈ahler-Einstein metrics”
In this joint work with Jian Song, we study the existence of conical K ̈ahler-Einstein metrics on a Fano manifold X and its relation to the greatest Ricci curvature lower bound R(X) of X.
Universal Algebra seminar
Matt Valeriote, McMaster University
"Characterizing congruence n-permutability"
Re-scheduled seminar from January 31, 2013.
Analysis seminar
Elcim Elgun, Department of Pure Mathematics, University of Waterloo
“The Eberlein Compactification of the Heisenberg Type Group Z×T×T”
Given a locally compact group G, the Eberlein compactification Ge is the spectrum of the uniform closure of the Fourier-Stieltjes algebra B(G). It is a semitopological semigroup compactification and thus a quotient of the weakly almost periodic compactification of G.
Pure Math colloquium
Xiaomei Zhao, Central China University and University of Waterloo
“Vinogradov-type estimates”
In this talk, we will begin with the classical Waring problem to outline the circle method, which includes a simple application of Vinogradov’s mean value theorem for minor arc esimates. We will also introduce more general Vinogradov-type estimates and their analogues in function fields.