====== 15th polymake conference and developer meeting ====== === February 2nd, 2024 === ===== polymake conference ===== On Friday there will be an invited talk and several tutorials, demos and helpdesk sessions for polymake users. Participants are encouraged to use a laptop with an installed version of polymake in the tutorials. If you have any polymake problem you want to get help during the workshop please describe your problem during the sign up process.\\ ===Location=== The workshop will take place in the E-N building of TU Berlin in the rooms 058 and 057. See [[https://maps.app.goo.gl/t7fztRZ5JW22CF8WA|here]] for a pin. **Warning:** On Friday there is a strike of parts of the public transport in Berlin until 10am. Until 10am only the S-Bahn will operate normally. ===Registration=== Please fill out the [[workshops:workshop0224:registration|registration form]]! ===Preliminary Schedule===
^ **Friday** ^ || | 09:00-09:30 | **Registration** | || | 09:30-10:30 | **Talk: Linear Programming and Diameters of Polytopes ** | || | ::: | // Volker Kaibel // | || | 10:30-11:00 | **Break and Helpdesk** || | 11:00-12:00 | **Tut: Polymake Basics ** E-N 058 | **Tut: Serialization** E-N 058 || | ::: | // George Balla // | //Antony Della Vecchia// || | 12:00-14:00 | **Lunch and Coffee** || | 14:00-15:00 | **Regular subdivisions** | **Johnson solids** | | ::: | // Laura Casabella // | //Alexej Jordan and Zoe Geiselmann// | | 15:00-15:30 | **Break and Helpdesk** || | 15:30-16:30 | ** Use cases: ** || | ::: | ** 1. Phylogenetic trees ** || | ::: | // Andrei Comăneci // || | ::: | ** 2. Quantum groups ** || | ::: | // Marcel Wack // || | 16:30-18:15 | **Helpdesk** || | ~18:45 | **Dinner** (self paid, at [[http://cafe-hardenberg.com/|Café Hardenberg]]) ||
=== Abstracts === == Volker Kaibel: Linear Programming and Diameters of Polytopes == We describe constructions of extended formulations that establish a certain relaxed version of the Hirsch-conjecture. Those constructions can be used to show that if there is a pivot rule (executable by a strongly polynomial time algorithm) for the simplex algorithm for which one can bound the number of steps by the diameters of the bases-exchange graphs of the polyhedra of feasible solutions then the general linear programming problem can be solved in strongly polynomial time. The talk is based on joint work with Kirill Kukharenko. == George Balla: Basics == In this tutorial, we will see some basic computations with polymake objects. The jupyter notebook for this tutorial can be downloaded {{ :workshops:polymake_basics.ipynb |here}}. == Antony Della Vecchia: Serialization == We will give an overview of serialization and how it can be useful for collaboration. We'll look at serialization in polymake and OSCAR, highlighting some of their similarities and differences. == Alexej Jordan and Zoe Geiselmann: How to produce a Johnson solid in OSCAR == In this short presentation we show how to compute the exact vertices of a Johnson solid and how to feed them into OSCAR in order to produce such a polytope. == Laura Casabella: Regular subdivisions of hypersimplices == In this tutorial we introduce regular subdivisions, hypersimplices and show how polymake deals with these objects. The corresponding jupyter notebook can be downloaded {{ :workshops:regular_subdivisions_of_hypersimplices_final.ipynb |here}}. == Andrei Comăneci: Phylogenetic trees == We talk about phylogenetic trees and how we can work with them in OSCAR. == Marcel Wack: Quantum groups == We'll talk about compact quantum groups, in particular quantum automorphism groups of matroids and graphs, and the tools OSCAR has for working with them. =====Hotel recommendations in proximity of the Institute of Mathematics:===== - [[https://www.hotel-bb.com/de/hotel/berlin-tiergarten|B&B Hotel Berlin-Tiergarten]], Englische Str. 1-4, Tel: +49 (0)30 33 00 66-0, Mail: berlin-tiergarten@hotelbb.com - [[https://www.novum-hotels.com/hotel-gates-berlin|Novum Hotel Gates]], Knesebeckstraße 8-9, Buchung über die Hamburger Reservierungszentrale nicht empfehlenswert! - [[https://www.ihg.com/hotelindigo/hotels/de/de/berlin/beriw/hoteldetail|Hotel Indigo Berlin - Ku’damm]], Hardenbergstrasse 15, Tel: +49 (0)30 860 90 90, Mail: info.indigoberlin@ihg.com - [[https://www.motel-one.com/de/hotels/berlin/hotel-berlin-kudamm/|Hotel Motel One Berlin-Ku’Damm]], Kannstraße 10, Tel: +49 (0)30 315 17 36-0, Mail: berlin-kudamm@motel-one.com - [[https://all.accor.com/hotel/3649/index.de.shtml|Novotel Berlin am Tiergarten]], Strasse des 17 Juni 106-108, Tel: +49 (0)30 60 03 50, Mail: h3649@accor.com ===== Developer meeting ===== The developer meeting takes place on February 1st and 3rd. If you want to participate in the developer meeting as well, please let us know by email. Developers can find more information [[internal/developermeeting0224|here]]. ===== Local organizers ===== - [[https://page.math.tu-berlin.de/~kastner/|Lars Kastner]] - [[https://page.math.tu-berlin.de/~wack/|Marcel Wack]] - [[https://page.math.tu-berlin.de/~weis/|Lena Weis]] Please contact us with any questions about the workshop. To email us, please use ''LASTNAME@math.tu-berlin.de''.