Combinatorics of essential sets for positroids

  • Francesca Zaffalon (KU Leuven)
G3 10 (Lecture hall)


Positroids are a class of nice realisable matroids, in bijection with many different combinatorial objects. In this talk I will introduce a new characterisation of positroids in terms of essential sets, which allow for a more intuitive understanding of their structure. I will show how one can use essential sets to study positroids and their cells inside the non-negative Grassmannian.

Mirke Olschewski

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