All Seminars & Colloquia

Dynamical Systems Seminar-On Penrose tilings and tiling dynamical systems: III

Friday, 2/8/2019, 2:00pm - 11:59pm

Title: On Penrose tilings and tiling dynamical systems: III

Speaker: Robbie Robinson, GWU Math

Date and Time: Friday, February 8th, 9:00–10:15am

Place: Phillips 736

Abstract: This time I discuss de Bruijn’s theorem on the structure of Penrose tilings (as duals of Penrose “pentagrams”) and show how to fit this into a dynamical systems context. This is lecture III in a series of IV.

Undergraduate Student Seminar-What do lattice paths have to do with matrices, and what is beyond both?

Wednesday, 2/6/2019, 11:00pm - Thursday, 2/7/2019, 11:59pm

University Seminar: Logic Across Disciplines-Computability via definability and polynomial computability

Wednesday, 2/6/2019, 8:45pm - 11:59pm

Title: Computability via definability and polynomial computability
Speaker: Sergei Goncharov, Russian Academy of Sciences
Date and Time: Wednesday, February 6, 3:45-4:45PM

Applied Mathematics Seminar-Regularized decovolution for antenna array

Monday, 2/4/2019, 9:00pm - 11:59pm

Title: Regularized decovolution for antenna array
Speaker: Debdeep Bhattacharya, GWU
Date and Time:Monday, February 4, 4:00pm-5:30pm
Place: Rome 730

Abstract. We shall discuss the Fourier-Wavelet Regularized Deconvolution (ForWaRD) method for an antenna array setup. We shall propose a cost function and discuss the optimal level-dependent parameters that balance the regularizations done in Fourier and Wavelet domain.

Graduate Student Seminar- How to get your math paper published

Friday, 2/1/2019, 7:00pm - 11:59pm

Title:How to get your math paper published

University Seminar: Logic Across Disciplines- Fraisse limits, ages, and computability

Friday, 2/1/2019, 5:00pm - 11:59pm

Title: Fraisse limits, ages, and computability
Speaker: Valentina Harizanov, GWU
Date and Time: Friday, February 1, 12:00-1:00PM

Dynamical Systems Seminar- On Penrose tilings and tiling dynamical systems: II

Friday, 2/1/2019, 2:00pm - 11:59pm

Combinatorics Seminar- Helly-type results on support lines for families of convex ovals

Thursday, 1/31/2019, 9:00pm - 11:59pm

Speaker: Valeriu Soltan, George Mason University
Date and time: Thursday, January 31, 4-5pm
Place: Rome 352
Title: Helly-type results on support lines for families of convex ovals

Abstract: We discuss the following new result of combinatorial geometry: a disjoint family of six or more unit circular disks in the plane has a common support line provided every its subfamily of three disks has a common support line.

Dynamical Systems Seminar- On Penrose tilings and tiling dynamical systems: I

Friday, 1/25/2019, 2:00pm - 11:59pm

Title: On Penrose tilings and tiling dynamical systems: I

Speaker: Robbie Robinson

Date and time: Friday, January 25, 9-10:15am

Place: Phillips 736

Abstract: Penrose tilings were discovered around 1976 by Sir Roger Penrose as he was trying to see how close he could come to tiling the plane by regular pentagons.

Combinatorics Seminar-Stanley-Reisner rings of symmetric simplicial complexes

Thursday, 1/24/2019, 9:00pm - 11:59pm

Speaker: Emanuele Delucchi, University of Fribourg
Date and time: Thursday, January 24, 4-5pm
Place: Rome 352
Title: Stanley-Reisner rings of symmetric simplicial complexes