Infosheet (January 31st, 2017) |
Queen's University - Department of Mathematics and Statistics |
Tuesday, January 31 |
Grad Seminar (Video) Time: 12:30 p.m. Place: Jeffery 115 |
Video: Jean-Pierre Serre https://en.wikipedia.org/wiki/Jean-Pierre_Serre Title: How to Write Mathematics Badly Info Attached |
Tuesday, January 31 |
Seminar in Free Probability and Random Matrices Time: 2:30 p.m. Place: Jeffery 222 |
Speaker: Josué Daniel Vázquez Becerra, Queen’s University Title: The effect of asymptotic liberation on the covariance of traces of random matrices Abstract Attached |
Tuesday, January 31 |
Dynamics Seminar Time: 3:30 p.m. Place: Jeffery 422 |
Speaker: Francesco Cellarosi Title: Furstenberg’s proof of Szemeredi’s Theorem Abstract Attached |
Thursday, February 2 |
Math Club Time: 5:30 p.m. Place: Jeffery 118 |
Speaker: Claude Tardiff, RMC Title: End to end auditable voting systems Abstract Attached |
Friday, February 3 |
Number Theory Seminar Time: 10:30 a.m. Place: Jeffery 422 |
Speaker: Richard Leyland Title: Class Field Theory and Complex Multiplication Abstract Attached |
Friday, February 3 |
Department Colloquium Time: 2:30 p.m. Place: Jeffery 234 |
Speaker: Arunabha Biswas, Queen’s University Title: A short story about higher Mahler measure Abstract Attached |
Items for the Info Sheet should reach Anne ( burnsa@queensu.ca) by noon on Monday. The Info Sheet is published every Tuesday.
Tuesday, January 31, 12:30 p.m. Jeffery 115 Grad Seminar
Speaker: Jean-Pierre Serre < https://en.wikipedia.org/wiki/Jean-Pierre_Serre >
Title: How to Write Mathematics Badly
Info: The talk is apparently from the Harvard “Basic Notions” seminar in 2003, and is both educational and hilarious. - A. Frankild
Tuesday, January 31, 2:30 p.m. Jeffery 222
Seminar in Free Probability and Random Matrices
Speaker: Josué Daniel Vázquez Becerra
Title: The effect of asymptotic liberation on the covariance of traces of random matrices
Abstract: In this talk, we present some estimations for the asymptotic behaviour of the covariance of (unnormalized) traces of random matrices, when conjugated by asymptotically liberating random unitary matrices.
Seminar website: http://www.mast.queensu.ca/~mingo/seminar/
Tuesday, January 31, 3:30 p.m. Jeffery 422 Dynamics Seminar
Speaker: Francesco Cellarosi
Title: Furstenberg’s proof of Szemeredi’s theorem
Abstract: In this expository talk, I will present the ergodic-theoretic proof of a famous theorem of E. Szemerédi. The theorem (proved in 1975, and previously known as a conjecture of P. Erdős and P. Turán) states that every set of integers with positive upper density contains arbitrary long arithmetic progressions. After the original combinatorial proof, H. Furstenberg found a different proof in 1977, using ergodic theory. He noticed that Szemerédi's theorem is equivalent to a statement about multiple recurrence of measure preserving transformations. I will explain the main ideas in the proof, and in particular why multiple recurrence occurs for special classes of examples: Bernoulli systems, and weakly mixing systems. The talk is based on a 1982 paper by H. Furstenberg, Y, Katznelson and D. Ornstein.
Thursday, February 2, 5:30 p.m. Jeffery 118 - Math Club
Speaker: Claude Tardiff
Title: End to end auditable voting systems
Abstract: Parallel to the topic of electoral reform, the newly evolving field of end to end auditable systems deals with ways to verify that the results of an election are correct using cryptography, ballots with serial numbers and voter receipts posted online. We will discuss the ThreeBallot system devised by Ron Rivest, and the problems with posting ballots online.
Friday, February 3, 10:30 a.m. Jeffery 422 - Number Theory Seminar
Speaker: Richard Leyland
Title: Class Field Theory and Complex Multiplication
Abstract: An elliptic curve is said to have complex multiplication if its endomorphism rings is strictly larger than the ring of integers. Class field theory classifies abelian extensions of a field K unramified outside a given finite list of primes. In this talk, we shall see that the theory of complex multiplication gives these extensions explicity for the case where K is an imaginary quadratic field.
Friday, February 3, 2:30 p.m. Jeffery 234 - Department Colloquium
Speaker: Arunabha Biswas
Title: A short story about higher Mahler measure
Abstract: In number theory, Mahler measure is kind of a height function of a polynomial and it is associated with Lehmer's conjecture which is an open problem for more than eight decades. Higher Mahler measure is a generalization of Mahler measure. In this talk I shall tell some old stories about Mahler measure and some new stories about higher Mahler measure.