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Friday, October 20, 2017 — 3:30 PM EDT

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 EDT

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 EDT

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).

Thursday, October 26, 2017 — 3:30 PM EDT

Title: Extended odd holes and their blockers

Speaker:

Ahmad Abdi

Affiliation: University of Waterloo
Room: MC 5479

Abstract:

Friday, October 27, 2017 — 3:30 PM EDT

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.

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