Irem Portakal

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 Ecole Normale Superieure in Lyon, France.

OvGU Magdeburg
Universitätsplatz 2
Gebäude 03, Raum 207b
39106 Magdeburg Germany

Telephone: 0391-67-58350

Email: irem [point] portakal [at] ovgu [dot] de

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.


  • On the classification of rigid toric varieties arising from bipartite graphs, to appear in February 2019.

  • Rigid toric matrix Schubert varieties, to appear in February 2019.

  • 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.