University of Bristol

Mon 26 Feb 2018, 3:00pm
Discrete Math Seminar
MATX 1101

Incidences in arbitrary fields

MATX 1101
Mon 26 Feb 2018, 3:00pm4:00pm
Abstract
The SzemerédiTrotter theorem gives a sharp upper bound on the maximum number of incidences between any finite sets of points and lines living in the real plane; this has also been extended to the complex plane. We can also ask for such an incidence bound over arbitrary fields. I will talk about two results in this direction in work joint with Frank de Zeeuw. The study of incidence bounds over the reals has found many applications in additive combinatorics; in arbitrary fields this utility remains true, and I shall present some of these applications.
hide

School of Interactive Computing College of Computing GeorgiaTech

Mon 26 Feb 2018, 3:00pm
SPECIAL
Institute of Applied Mathematics
ESB 2012

Optimizing physical contacts for locomotion and manipulation: turning the challenges of contacts into solutions.

ESB 2012
Mon 26 Feb 2018, 3:00pm4:00pm
Abstract
hide

SFU

Mon 26 Feb 2018, 4:00pm
SPECIAL
Algebraic Geometry Seminar
MATX 1118

Fujita's Freeness Conjecture for ComplexityOne TVarieties

MATX 1118
Mon 26 Feb 2018, 4:00pm5:00pm
Abstract
Fujita famously conjectured that for a $d$dimensional smooth
projective variety $X$ with ample divisor $H$, $mH+K_X$ is basepoint
free whenever $m\geq d+1$. I will discuss recent joint work with Klaus
Altmann in which we show this conjecture is true whenever $X$ admits
an effective action by a torus of dimension $d1$.
hide

University of Toronto

Wed 28 Feb 2018, 3:10pm
Probability Seminar
LSK 460

The global limit of random sorting networks

LSK 460
Wed 28 Feb 2018, 3:10pm4:10pm
Abstract
A sorting network is a shortest path from the identity to the reverse permutation in the Cayley graph of S_n generated by adjacent transpositions. An nelement uniform random sorting network displays many striking global properties as n approaches infinity. For example, scaled trajectories of the elements 1, 2, ... n converge to sine curves and the 1/2way permutation matrix measure converges to the projected surface area measure of the 2sphere.
In this talk, I will discuss how the local structure of random sorting networks can be used to find a global limit, proving these statements and more.
hide

ICTS, Bangalore

Wed 28 Feb 2018, 3:15pm
Mathematical Biology Seminar
ESB 4127

Data assimilation and parameter estimation

ESB 4127
Wed 28 Feb 2018, 3:15pm4:15pm
hide

Seminar Information Pages

Note for Attendees
Reception before the talk in ESB 4133 (the PIMS lounge). This talk is in the IAM/PIMS distinguished speaker series.