The FPSAC 2020 Poster Session

We will present a poster at the FPSAC 2020 online poster session on Wednesday the 15th of July 2020 at 14:00 UTC.
More details can be found in the extended abstract or the preprint on the arxiv.

Title: Undecidability of c-Arrangement Matroid Representations


A c-arrangement is an arrangement of dimension-c subspaces such that all their sums have dimension a multiple of c. Matroids arising as normalized rank functions of c-arrangements are also known as multilinear matroids. We prove that there is no algorithm to decide whether a matroid is multilinear. In particular there is no algorithm to decide whether there exists a representable multiple of a given polymatroid.


We plan to restart a short 10-15 minute presentation about the poster at the following times: In the remaining time we are happily available for questions and discussions.


Lukas Kühne
lukas DOT kuehne AT mail DOT huji DOT ac DOT il


Geva Yashfe
geva DOT yashfe AT mail DOT huji DOT ac DOT il

Einstein Institute for Mathematics
Hebrew University of Jerusalem
Edmond J. Safra Campus, Givat Ram
91904 Jerusalem, Israel