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What's Happening This Week In Mathematics....

 

SFU/UBC Number Theory Seminar

Thursday, January 29, 2015 | 3:30 pm | ASB 10940


Speaker: Nils Bruin (SFU)

Title: Genus 2 curves with (3, 3)-isogenies and 3-torsion in Sha

Abstract: We parametrize genus 2 curves with a maximal isotropic (Z/3)^2 in their Jacobian, together with an explicit description of the associated isogeny. This allows us to perform (3, 3)-isogeny descent on various simple principally polarized abelian surfaces and exhibit non-trivial 3-part in their Tate-Shafarevich groups. This is joint work with Victor Flynn and Damiano Testa.


CSC Weekly Seminar - Richard Vaughan

Friday, January 30, 2015
TASC-2, Rm 8500
2:30 pm

Speaker: Richard Vaughan, SFU

Title: “Intelligent" Interactions with Surprisingly Simple Robots

Abstract: Sensing and state estimation for autonomous mobile robots has improved dramatically in the last few years, but we do not see robots around us yet. How should robots behave around people and each other to get things done? My group works on behavioural strategies for mobile robots that exploit the new sensing capabilities, and allows them to perform sophisticated, robust interactions with the world and other agents.
I’ll show videos of a series of novel vision-mediated Human-Robot Interactions with teams of driving and flying robots. I’ll also describe work on adaptive path planning and task allocation where we reach very good performance on hard optimization problems.
In most cases the mechanisms we use are surprisingly simple, and we like it that way.

Richard Vaughan is Associate Professor of Computing Science at Simon Fraser University, where he directs the Autonomy Lab.
http://autonomylab.org

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Upcoming Events

  • SFU/UBC Number Theory Seminar
    3:30 PM - 4:30 PM
    January 29, 2015
    Speaker: Nils Bruin (SFU) Title: Genus 2 curves with (3, 3)-isogenies and 3-torsion in Sha Abstract: We parametrize genus 2 curves with a maximal isotropic (Z/3)^2 in their Jacobian, together with an explicit description of the associated isogeny. This allows us to perform (3, 3)-isogeny descent on various simple principally polarized abelian surfaces and exhibit non-trivial 3-part in their Tate-Shafarevich groups. This is joint work with Victor Flynn and Damiano Testa.
  • CSC Weekly Seminar - Richard Vaughan
    2:30 PM - 3:30 PM
    January 30, 2015
    CSC Weekly Seminar Friday, January 30, 2015 TASC-2, Rm 8500 2:30 pm Speaker: Richard Vaughan, SFU Title: “Intelligent" Interactions with Surprisingly Simple Robots Abstract: Sensing and state estimation for autonomous mobile robots has improved dramatically in the last few years, but we do not see robots around us yet. How should robots behave around people and each other to get things done? My group works on behavioural strategies for mobile robots that exploit the new sensing capabilities, and allows them to perform sophisticated, robust interactions with the world and other agents. I’ll show videos of a series of novel vision-mediated Human-Robot Interactions with teams of driving and flying robots. I’ll also describe work on adaptive path planning and task allocation where we reach very good performance on hard optimization problems. In most cases the mechanisms we use are surprisingly simple, and we like it that way. Richard Vaughan is Associate Professor of Computing Science at Simon Fraser University, where he directs the Autonomy Lab. http://autonomylab.org
  • Discrete Math Seminar: Manuel Kauers
    1:30 PM - 2:30 PM
    February 3, 2015
    Tuesday February 3, 1:30PM k9509 Speaker: Manuel Kauers (RISC) Title:Walks in the Quarter Plane with Multiple Steps
  • Discrete Math Seminar
    1:30 PM - 2:30 PM
    February 3, 2015
    No Description
  • Operations Research Seminar: Soon-Yi Wu
    2:30 PM - 3:30 PM
    February 5, 2015
    Title: On finite convergence of an explicit exchange method for convex semi-infinite programming problems with second-order cone constraints Abstract: In this talk, we propose an explicit exchange algorithm for solving semi-infinite programming problem (SIP) with second-order cone (SOC) constraints. We prove, by using the slackness complementarity conditions, that the algorithm terminates in a finite number of iterations and the obtained solution sufficiently approximates the original SIP solution. In existing studies on SIPs, only the nonnegative constraints were considered, and hence, the slackness complementarity conditions were separable to each component. However, in our study, the existing componentwise analyses are not applicable anymore since the slackness complementarity conditions are associated with SOCs. In order to overcome such a difficulty, we introduce a certain coordinate system based on the spectral factorization. In the numerical experiments, we solve some test problems to see the effectiveness of the proposed algorithm.
  • Discrete Math Seminar
    1:30 PM - 2:30 PM
    February 17, 2015
    No Description
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