The retreat at halftime of the SFBTRR 195 with a view to the future takes place from Monday, 18th February to Thursday, 21st February, in the Ebernburg in Bad Münster am Stein. The organisors are Hannah Markwig, Gunter Malle and Michael Kunte.
Program
The main intention is to strengthen cooperation within SFBTRR 195. Therefore, there will only be very few plenary lectures, instead all mathematical and all software focuses should be given enough opportunity to retreat and work together. In addition, there will be overview lectures for each mathematical focus and also from the OSCAR project, which generally explain how the status of the respective subprojects and their embedding in the overall objective is.
The second focus of the retreat will be the strategic development of the SFBTRR 195. The aim of the retreat is the preparation of a first list of preliminary projects of the second funding period.
In addition, the second meeting of the IRTG seminar of the PhDstudents in the SFBTRR 195 will be held during the retreat.
Speakers
Talk  Speaker  

Group and representation theory  survey talk / presentation  Gunter Malle 
Algebraic geometry, commutative and noncommutative algebra  survey talk / presentation  FrankOlaf Schreyer 
Tropical and polyhedral geometry  survey talk / presentation  Hannah Markwig 
Free probability and random matrices  survey talk / presentation  Roland Speicher 
Number theory  survey talk / presentation  Gabriele Nebe 
Computational developments / OSCAR  survey talk / presentation  Wolfram Decker 
Finite simple groups and their representations  plenary lecture  Gerhard Hiß 
Chevalley’s Theorem on constructible images made constructive  plenary lecture  Mohamed Barakat 
Abstracts of the talks:
Gerhard’s talk: This talk is intended as a survey, addressing nonspecialists, on finite simple groups. After introducing some of them, I will focus on the fundamental questions concerning their subgroups and linear representations. Using specific examples, I will comment on the state of art with respect to these questions.
Mohamed’s talk: Chevalley proved that the image of an algebraic morphism between algebraic varieties is a constructible set. Examples are orbits of algebraic group actions. A constructible set in a topological space is a finite union of locally closed sets and a locally closed set is the difference of two closed subsets. Simple examples show that even if the source and target of the morphism are affine varieties the image may neither be affine nor quasiaffine. In this talk I will present an Gröbnerbasisbased algorithm which computes the constructible image of a morphism of affine spaces.
Schedule
Time  Monday 18th Feb  Tuesday 19th Feb  Wednesday 20th Feb  Thursday 21st Feb 

9:0010:30  Group work: Five Core areas  Group work  9:009:30: Group work, 9:3010:30: Presentations new projects of the SFBTRR 195 

10:3011:00  Coffee break  Coffee break  Coffee break  
11:0012:30  Group work: E.g. OSCAR  Group work  Presentations new projects of the SFBTRR 195  
12:3013:30  Lunch  Lunch  Lunch  
13:3015:30  4x25 min Presentations  Group work / IRTGSeminar  Group work  Steering Committee Meeting 
15:3016:00  Coffee break  Coffee break  Coffee break  Coffee break 
16:0017:00  2x25 min Presentations  plenary lecture  plenary lecture  
17:0017:30  Planning the group work  Planning the group work  Planning the group work  
18:0019:00  Dinner  Dinner  Dinner  
19:00  Wine tasting  Steering Committee Meeting 
We start at Monday, 18th Feb, at 13:30, with the presentations at the MartinLutherSaal. For nonmembers of the Steering Committee the retreat ends after lunch on Thursday, 21st.
Confirmed Participants
Ali Aslam 
Mohamed Barakat 
Reimer Behrends 
Janko Böhm 
Bernhard Böhmler 
Simon Brandhorst 
Thomas Breuer 
Wolfram Decker 
Claus Fieker 
Johannes Flake 
Ghislain Fourier 
Anne FrühbisKrüger 
Andreas Gathmann 
Meinolf Geck 
Daniel Gromada 
Sebastian Gutsche 
William Hart 
Jonas Hetz 
Gerhard Hiß 
Johannes Hoffmann 
Tommy Hofmann 
Max Horn 
Michael Joswig 
Stefan Jung 
Lars Kastner 
Yeongrak Kim 
Markus Kirschmer 
Matthias Klupsch 
Michael Kunte 
Caroline Lassueur 
Vladimir Lazic 
Viktor Levandovskyy 
Frank Lübeck 
Laura Maaßen 
Gunter Malle 
Suri Mannaperuma 
Magdaleen Marais 
Hannah Markwig 
Gabriele Nebe 
Alice Niemeyer 
Alessandro Paolini 
Miguel Pluma 
Sebastian Posur 
Emil Rotilio 
Simon Schmidt 
Hans Schönemann 
FrankOlaf Schreyer 
Pascal Schweitzer 
Carlo Sircana 
Roland Speicher 
Andreas Steenpass 
Christian Steinhart 
Isabel Stenger 
Andrea Thevis 
Ulrich Thiel 
Ayush Kumar Tewari 
Sascha Timme 
Yvonne Weber 
Moritz Weber 
Gabriela WeitzeSchmithüsen 
Sheng Yin 
Eva Zerz 
Registration
Since the presence of all PIs is essential, a room will be reserved for each PI. We ask postdocs, doctoral students and others to register with Michael Kunte or Barbara Ermisch via email until November 30th, 2018.
Location
The Ebernburg in Bad Münster am Stein can be easily reached by train (train station “Bad Münster am Stein”) or car from all main locations.
If the weather is good, we also organize a group trip by bicycle from Kaiserslautern.