Irem Portakal

Dr. Irem Portakal

Gebäude 03, Universitätsplatz 2, 39106 Magdeburg, G03-207b

I am a postdoctoral researcher in the Discrete, Convex and Toric Geometry research group of Benjamin Nill at Otto-von-Guericke-Universität Magdeburg. I defended my thesis in April 2018 at Freie Universität Berlin. I was a PHD Student in Berlin Mathematical School and in the Algebraic Geometry Group of Klaus Altmann. Before, I was a master student at École Normale Supérieure in Lyon, France and an undergraduate student at Galatasaray University in Istanbul, Turkey.

Research Interests

Deformation theory of toric varieties and T-varieties, mutations of lattice polytopes, edge cones and polytopes, torus actions on matrix Schubert varieties and Kazhdan-Lusztig varieties.

  • Rigid toric matrix Schubert varieties, in preparation.

  • Rigidity of toric varieties associated to bipartite graphs, PHD Thesis, online at Freie Universität Berlin.


  • Rigid toric bipartite graphs, GitHub. Polymake and Singular scripts for investigating the rigidity of toric varieties arising from a bipartite graph.

Last Modification: 23.04.2019 - Contact Person: Dr. Burkhard Thiele