Upcoming Research Activities


Fall 2016 (15-19 Aug. + 3-7 Oct) Participation (?) at Thematic Program on "Combinatorial Algebraic Geometry" at Fields Institute.
7-10 Oct. 2015 Participation (?) at the Workshop "Combinatorial and Experimental Methods in Commutative Algebra and Related Fields" at Osnabrück.
3-7 Aug. 2015 Participation at minisymposium "Combinatorial methods in Algebraic Geometry" at the SIAM Conference on Applied Algebraic Geometry 2015, Daejeon, South Korea.
29 June - 3 July 2015 Research visit at FU Berlin, overlap with BMS summer school Convex geometry - discrete and computational.


Current and Past Research Activities


12-14 May 2015 Visit of Lukas Katthän from Osnabrück University at Stockholm University (talk in Algebra and Geometry Seminar at KTH, May 13, on `Stanley depth, partitionable simplicial complexes and the lcm lattice').
1-7 Feb. 2015 Participant at the Workshop "Geometric and Algebraic Combinatorics" at Oberwolfach.
26 Aug. - 2 Sep. 2014 Visit of Alexander Kasprzyk from Imperial College London at Stockholm University (talk in Algebra and Geometry Seminar at KTH, Aug 27, on `The combinatorics of Mirror Symmetry').
25 Aug. - 11 Sep. 2014 Visit of Akihiro Higashitani (on the right) from Osaka University at Stockholm University (talk in Combinatorics Seminar at SU, Sept 10, on `Introduction to Ehrhart polynomials of lattice polytopes and their characterization ').
16-28 June 2014 Visit of Alexander Kasprzyk from Imperial College London at Stockholm University.
9-10 May 2014 Participation at Symposium Diskrete Mathematik 2014 in Frankfurt (pics).
9 April 2014 Talk "Geometry of numbers and toric Fano varieties" in the Algebra and Geometry Seminar at Stockholm University.
11-23 March 2014 Visit of Benjamin Assarf from TU Berlin at Stockholm University.
11 March 2014 Talk "Combinatorial challenges of toric Fano varieties" in the Algebra and Geometry Seminar at Uppsala University.
25 October 2013 Talk "Ehrhart polynomials and discriminants" in the General seminar of the Mathematics institute at Stockholm University.
16 October 2013 Talk "The mixed degree of lattice polytopes" in the Combinatorics seminar at KTH Stockholm.
16 September 2013 Talk "Gitterpolytope - von Ehrhart-Theorie zu kombinatorischen Hodgezahlen" at TU Berlin.
1-4 August 2013 Coorganizer (with Ivan Soprunov) of minisymposium "Toric geometry, Lattice points, and Applications" at the SIAM Conference on Applied Algebraic Geometry 2013, Colorado State University.
Aug. 2013 - Current Senior Lecturer (Associate Professor) at Stockholm University.
17-21 June 2013 Research stay at LAMA Chambery, invited by Frederic Bihan, and Colloquium talk "Ehrhart polynomials and A-Discriminants".
3-7 June 2013 Talk "Lattice polytopes with a view toward algebraic geometry" as invited speaker at MEGA 2013 (Effective Methods in Algebraic Geometry) in Frankfurt.
6-7 April 2013 Talk "From Ehrhart theory to almost-neighborly polytopes" at AMS special session on "Discrete Geometry of Polytopes" at Boston College.
23-27 January 2013 Research stay at San Francisco State University, invited by Matthias Beck, and talk "From Ehrhart theory to almost-neighborly point configurations" in the Combinatorics Seminar.
29 November 2012 Talk "Ehrhart-Theorie, A-Diskriminanten und kombinatorische Hodgezahlen" at Hannover University.
22-27 November 2012 Research stay at KTH Stockholm, invited by Sandra Di Rocco.
20-21 October 2012 Coorganizer of AMS Special Session "Toric Algebraic Geometry and Beyond" at the AMS Central Fall Section Meeting, University of Akron.
16 October 2012 Talk "On Ehrhart's volume conjecture" in the Analysis seminar at CWRU.
19-24 August 2012 Talk "Recent developments in the geometry of numbers of lattice polytopes" at minisymposium "Integer points in polytopes" of 21st International Symposium on Mathematical Programming at Berlin, Germany.
17-18 August 2012 Participation at Symposium on Discrete Mathematics (Tagung der Fachgruppe Diskrete Mathematik) at TU Berlin.
13-16 August 2012 Talk "Von Ehrhart-Theorie zu fast-nachbarschaftlichen Polytopen" in the research seminar of Algorithmic Discrete Mathematics at TU Darmstadt, invited by Michael Joswig and Andreas Paffenholz.
30 July - 3 Aug. 2012 Poster "Permutation Polytopes of Cyclic Groups" at FPSAC 2012 at Nagoya University.
23 - 27 July 2012 Talk "Ramifications of the degree of lattice polytopes" at Workshop Convex Polytopes at Kyoto University.
5 - 20 July 2012 Stay at the Research Group Lattice Polytopes at the Goethe Universität Frankfurt am Main.
4 - 9 June 2012 Talk "Multiples of lattice polytopes with no interior lattice points" (Video) at Conference dedicated to Askold G. Khovanskii at Independent University of Moscow.
15-21 April 2012 Talk "Combinatorial questions related to stringy E-polynomials of Gorenstein polytopes" at the Workshop "Toric Geometry" at Oberwolfach.
10-11 March 2012 Talk "A combinatorial generalization of the degree of lattice polytopes" at AMS special session on "Combinatorics: Algebraic and Geometric" at University of South Florida.
15-18 February 2012 Visit and colloquium talk of Matthias Beck at CWRU.
29 November 2011 Talk "The geometry of numbers of lattice polytopes" in the Analysis Seminar at CWRU.
4 November 2011 Colloquium talk "Ehrhart theory in practice" at Cleveland State University.
28-30 October 2011 Participation at AGNES meeting at Stony Brook.
16 September 2011 Colloquium talk "Ehrhart theory in practice" at Case Western Reserve University.
Aug. 2011 - July 2013 Tenure-track assistant professor at Case Western Reserve University.
11-13 July 2011 Visit at the Universität Bielefeld, invited by Barbara Baumeister.
25-28 June 2011 Talk "Toric Fano varieties and lattice polytopes" at the "Memorial Conference for Maximilian Kreuzer" in Vienna. Max was a coauthor of two papers with an amazing, supportive personality. While being a string theorist, his groundbreaking work and interest in lattice polytopes was an enduring source of inspiration for me. He passed away in 2010 at the age of just 50 years. His loss is strongly felt.
9 June 2011 Invited talk "Lattice polytopes with a view toward toric geometry" at the conference "Toric Geometry and Applications" in Leuven.
2 June 2011 Talk "Adjunction theory and dual defect of polarized toric varieties" in The MAGIC Seminar at Imperial College London, invited by Alexander Kasprzyk.
27 May 2011 Talk "Lattice Polytopes and Geometry of Numbers" at the Institut für Mathematische Optimierung at the Universität Magdeburg, invited by Gennadiy Averkov.
5-7 May 2011 Participation at workshop "Discrete, Tropical and Algebraic Geometry" in Frankfurt
1 May - 31 July 2011 Stay at the Research Group Lattice Polytopes at the Goethe Universität Frankfurt am Main.
31 March 2011 Talk "Experimental Mathematics with Lattice Polytopes" in the Math Club at UGA.
14-18 March 2011 Visit of Jan Schepers at UGA.
12-13 March 2011 Talk "Adjunction-theoretic invariants of polarized toric varieties" in the AMS Special Session on "Algebraic Geometry" at the 2011 Spring Southeastern Section Meeting at Statesboro, GA.
3 February 2011 Talk "Adjunktionstheorie und Gitterpolytope" in the Oberseminar Algebraische Geometrie at the Fachbereich Mathematik of the Eberhard Karls Universität Tübingen.
17 January - 26 February 2011 Stay at the Mittag-Leffler Institute in Stockholm as participant in the program "Algebraic Geometry with a view towards applications".
6-9 January 2011 Talk "Polyhedral Adjunction Theory" in the AMS Special Session on "Combinatorial Algebraic Geometry" at the 2011 Joint Mathematics Meetings in New Orleans.
21-24 October 2010 Attendance of the conference "Compact Moduli and Vector Bundles" at UGA.
4 October 2010 Talk "Reflexive polytopes, Gorenstein polytopes, and combinatorial mirror symmetry" in the CATS Seminar at the University of Kentucky, invited by Ben Braun.
1 October 2010 Volunteer at the High School Varsity Math Tournament at UGA.
1 September 2010 Talk "Stringy E-functions of Gorenstein polytopes" in the Algebraic Geometry Seminar at UGA.
20. June - 7. August 2010 Research stay at the Research Group Lattice Polytopes at the Freie Universität Berlin on invitation of Christian Haase.
10. June 2010 Talk "Dual defect toric manifolds and the Cayley polytope conjecture" in the Computational Algebra Seminar at the University of Sydney.
30. May - 20. June 2010 Research stay at the Computational Algebra Group at the University of Sydney on invitation of Alexander Kasprzyk.
3. Feb. 2010 Talk "On projective toric manifolds with dual defect" in the Algebraic Geometry Seminar at UGA.
Jan. 2010 - July 2011 Postdoc in the Research Group Geometry at the University of Georgia.
11. Dez. 2009 Talk "A simple condition for a projective toric manifold to have dual defect" in the Postdoctoral seminar at the MSRI.
20. Nov 2009 Talk "'Hollow' Lattice Polytopes" in the Algebra and Discrete Mathematics Seminar at UC Davis, invited by Jesús de Loera.
19.-23. Oct. 2009 Participant of the Workshop II: Combinatorial Geometry at the Institute for Pure and Applied Mathematics at UCLA.
Aug. - Dec. 2009 Postdoc at the Mathematical Sciences Research Institute as a participant of the Tropical Geometry program.
22.-24. June 2009 Visit of Alexander Kasprzyk from the University of Kent at our research group.
20. May 2009 Talk "Hollow lattice polytopes and Ehrhart theory" at the Combinatorics seminar at KTH Stockholm.
18. - 24. May 2009 Research stay at the Algebraic geometry group at KTH Stockholm on invitation of Sandra Di Rocco.
27. April - 1. May 2009 Participant of the workshop "Combinatorial challenges in toric varieties" at the American Institute of Mathematics, Palo Alto.
25. - 26. April 2009 Talk "Bounds on lattice polygons and the classification of toric log Del Pezzo surfaces" at the Special Session on Algebra and Number Theory with Polyhedra at the AMS Meeting at San Francisco State University.
Summer term 2009 Lecture "Discrete Mathematics III - Integer Polyhedra" at the FU Berlin as part of the Berlin Mathematical School in joint work with Christian Haase and Andreas Paffenholz.
1. April 2009 Talk "'Hollow' Lattice Polytopes - From Geometry of Numbers to Adjunction Theory" at the Discrete Math Seminar at UC Berkeley, invited by Raman Sanyal.
23. - 27. March 2009 Participant of the workshop "Combinatorial, Enumerative and Toric Geometry" at the MSRI, Berkeley.
9.-13. February 2009 Visit of Sandra Di Rocco from KTH Stockholm at our research group.
12.-16. January 2009 Visit of Sam Payne (U Stanford) and Alan Stapledon (U Michigan) at our research group.
4.-10. Jan. 2009 Participant of the Workshop "Toric Geometry" at Oberwolfach.
3. Dez. 2008 Participant of the one-day-workshop "The North German Plain Goes Tropical" at the Courant Research Center, University of Göttingen.
2. Dez. 2008 Talk "Lattice Polytopes and Geometry of Numbers" at the Oberseminar of the Institute for Algebra and Geometry at the Universität Magdeburg, invited by Martin Henk.
15. Nov. 2008 Talk "Lattice width directions and Minkowski's 3^d-theorem" at the conference on combinatorics "KolKom 2008" at the Universität Magdeburg.
14.-20. Sept. 2008 Coorganizer of the Minisymposium "Algebraische und geometrische Kombinatorik" at the 2008 DMV Jahrestagung (annual conference of the German Mathematical Society) at Erlangen.
13. July - 3. Aug. 2008 Participant of the workshop ""P.R.A.G.MAT.I.C. 2008" (Free resolutions and Hilbert series) at the University of Catania, Sicily.
9. July 2008 Participant of the one-day-workshop "A tropical Wednesday in Göttingen" at the Courant Research Center, University of Göttingen.
10.-12. Jan. 2008 Attendance at the PhD defense of Mikkel Øbro at the University of Aarhus.
10. Dec. 2007 Colloquium "The degree of lattice polytopes" at the Graduiertenkolleg Methods for Discrete Structures at Freie Universität Berlin.
12. Oct. 2007 Talk "The degree of lattice polytopes" at the Algebra-Geometry-Combinatorics Seminar at San Francisco State University, invited by Joseph Gubeladze.
10. Oct. 2007 Talk "The degree of lattice polytopes" at the Combinatorics and Geometry Seminar at Stanford University.
8. - 17. October 2007 Research stay at Stanford University on invitation of Sam Payne.
6. - 7. Oct. 2007 Talk "Combinatorial aspects of mirror symmetry" at the Special Session on Toric Varieties of the Fall Eastern Section Meeting of the AMS at Rutgers University.
2. Oct. 2007 Talk "The degree of lattice polytopes" at the Combinatorics Seminar at the University of Minnesota, invited by Milena Hering.
2. Oct. 2007 Talk "Fast food, square magic, and polyhedra" at the Postdoc Seminar at the IMA in Minneapolis.
12. - 18. Aug. 2007 Participant of the Mini-Workshop " Projective Normality of Smooth Toric Varieties" at Oberwolfach (projective normality webpage).
Summer term 2007 Lecture "Combinatorial Commutative Algebra" at the FU Berlin in joint work with Christian Haase.
2.-13. July 2007 Visit of Mikkel Øbro from the University of Aarhus at our research group.
18. - 22. June 2007 Talk "Combinatorial aspects of toric geometry and mirror symmetry - open problems" at GAeL XV in Istanbul.
12. March 2007 Talk at the workshop on "Gorenstein and reflexive polytopes" at the Free University of Berlin.
6.-12. Dec. 2006 Visit of Jaron Treutlein from the University of Tuebingen at our research group.
16.-18. Nov. 2006 Talk "Permutation polytopes" at the conference on combinatorics "KolKom 2006" at the Universität Magdeburg.
18. Oct. 2006 Received the thesis-award "Promotionspreis" of the University of Tuebingen in the subject Mathematics.
26. - 30. June 2006 Research stay at the Institute for Theoretical Physics of the Technical University of Vienna on invitation of Maximilian Kreuzer.
11. - 15. June 2006 Talk "Degree of lattice polytopes" at the Joint Summer Research Conference "Integer points in polyhedra. Geometry, Number Theory, Representation Theory, Algebra, Optimization, Statistics " at Snowbird.
11.-16. March 2006 Visit of Boris Pasquier from Institute Fourier at our research group.
Summer term 2006 Lecture "Convex Geometry" at the FU Berlin.
29. Jan. - 4. Feb. 2006 Participant of the Workshop "Convex and Algebraic Geometry" at Oberwolfach.
Oct. 2005 - July 2009 Postdoc in the Research Group Lattice Polytopes at the FU Berlin lead by Christian Haase.
20. - 26. Aug. 2005 Talk "Reflexive polytopes - Combinatorics and Convex Geometry" at Euroconference in Mathematics on Crete - Algebraic and Geometric Combinatorics in Anogia
4. Aug. 2005 Participant of "2005 Duke-Berlin Geometry and Physics Festival" in Berlin
16. Nov. 2004 Talk "Reflexive polytopes" at Duke University, invited by Christian Haase
11. Nov. 2004 Talk "Reflexive polytopes" at the University of Michigan 09/11/2004, invited by Milena Hering
12.-17. Sept. 2004 Participant of 2004 DMV Jahrestagung (annual conference of the German Mathematical Society) at Heidelberg
28. Jan. 2004 Talk "Gorenstein toric Fano varieties and reflexive polyhedra" at Freie Universität Berlin, invited by Klaus Altmann
26. Jan. - 1. Feb. 2003 Participant and editor of the report of the Workshop " Combinatorics, Convexity and Algebraic Geometry" at Oberwolfach. (Here are some pictures by Allen Knutson.)
Oct. 2001 - July 2005 PhD student at the Research Group Algebra of the Eberhard Karls Universität Tübingen advised by Victor V. Batyrev.