3
votes
Accepted
The Salvetti complex of a non-realizable oriented matroid
I think, the reference you are looking for is the paper by Björner and Ziegler "Combinatorial Stratification of Complex Arrangements" in JAMS.
They give a complete combinatorial proof in Sec....
3
votes
Matroids of hypercubes
A.O. Matveev's paper discusses these these matroids, but with a focus on topes rather than circuits.
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