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Friday, October 6, 2017 3:30 pm - 3:30 pm EDT (GMT -04:00)

Tutte Colloquium: Jason Bell

Title: Enumeration in quantum algebras

Speaker: Jason Bell
Affiliation: University of Waterloo
Room: MC 5501

Abstract:

Many of the classical algebras that occur in algebraic geometry and other mathematical fields have natural quantizations; that is, one can deform the multiplication rule using a parameter q, which has the property that when we specialize q at 1 we recover the classical object.  As part of the general goal of understanding the representation theory of these rings, one often wants to understand the prime spectra of these algebras, that is, the collection of prime ideals in these rigs. 

Thursday, October 12, 2017 3:30 pm - 3:30 pm EDT (GMT -04:00)

Algebraic Graph Theory Seminar - Chris Godsil

Title: A Short Introduction to Projective Geometry

Speaker: Chris Godsil
Affiliation: University of Waterloo
Room: MC 6486

Abstract:

Basically, see the title. I will be considering the real and complex cases mainly, because that is
what is needed in quantum physics.

Thursday, October 19, 2017 3:30 pm - 3:30 pm EDT (GMT -04:00)

Special Seminar - Fan Chung Graham

Title: Sequences: random, structured or something in between?

Speaker: Fan Chung Graham
Affiliation:

University of California, San Diego

Room:  MC 5501

Abstract:

There are many fundamental problems concerning sequences that arise in many areas of mathematics and computation.  Typical problems include finding or avoiding patterns; testing or validating various `random-like’ behavior; analyzing or comparing different statistics, etc.

Friday, October 20, 2017 3:30 pm - 3:30 pm EDT (GMT -04:00)

Tutte Colloquium - Tsz Chiu Kwok

Title: The Paulsen problem, continuous operator scaling, and smoothed analysis

Speaker: Tsz Chiu Kwok
Affiliation: University of Waterloo
Room: MC 5501

Abstract:

The Paulsen problem is a basic open problem in operator theory: Given vectors u1, ..., un in Rd that are eps-nearly satisfying the Parseval's condition and the equal norm condition, is it close to a set of vectors v1, ..., vn in Rd that exactly satisfy the Parseval's condition and the
equal norm condition? Given u1,..., un, we consider the squared distance to the set of exact solutions.

Wednesday, October 25, 2017 4:00 pm - 4:00 pm EDT (GMT -04:00)

Continuous Optimization Seminar - Julian Romero

Title: Coordinate Descent Algorithms

Speaker: Julian Romero
Affiliation: University of Waterloo
Room: MC 5479

Abstract:

We will be discussing the survey of Stephen J. Wright on coordinate descent algorithms. Coordinate descent algorithms solve optimization problems by successively performing approximate minimization along coordinate directions or coordinate hyperplanes. They have been used in applications for many years, and their popularity continues to grow because of their usefulness in data analysis, machine learning, and other areas of current interest.

Thursday, October 26, 2017 3:30 pm - 3:30 pm EDT (GMT -04:00)

Algebraic Graph Theory Seminar - Chris Godsil

Title: Progress on Continuous Quantum Walks

Speaker: Chris Godsil
Affiliation: University of Waterloo
Roon: MC 6486

Abstract:

I will discuss the progress we’ve made in our work on continuous walks. I will start with old stuff (last November) and continue on to current stuff (this week).

Friday, October 27, 2017 3:30 pm - 3:30 pm EDT (GMT -04:00)

Tutte Colloquium - Chi Kwong Li

Title: Some matrix problems in quantum information science

Speaker: Chi-Kwong Li
Affiliation: College of William and Mary, IQC
Room: MC 5501

Abstract:

In this talk, we present  some matrix results and techniques in solving certain optimization problems arising  in quantum information science.

No quantum mechanics background is required.

Wednesday, November 1, 2017 4:00 pm - 4:00 pm EDT (GMT -04:00)

Continuous Optimization Seminar - Ryan Kinnear

Title: A Stochastic Gradient Method with an Exponential Convergence Rate for Finite Training Sets

Speaker: Ryan Kinnear
Affiliation: University of Waterloo
Room: MC 5479

Abstract:

We will be discussing the paper (having the same title) by Roux, Schmidt, and Bach.  The authors propose a new stochastic gradient method for optimizing the sum of
 a finite set of smooth functions, where the sum is strongly convex.