Representability conjecture for coordinate q-matroids

A coordinate qq-matroid is a qq-matroid whose cyclic flats are spanned by subsets of some linear basis. Its corresponding matroid is the matroid obtained from the coordinate representation by replacing coordinate subspaces with their corresponding subsets of the basis.

Representability conjecture for coordinate q-matroids. If the corresponding matroid of a coordinate qq-matroid is representable, then the qq-matroid is representable.

The preceding embedding results establish representability for certain coordinate qq-matroids, but the conjecture proposes that representability of the corresponding matroid always lifts to the qq-matroid.

Sources & referencesView supporting material

Primary source

Andrew Fulcher, “A cyclic flat embedding theorem for transversal q-matroids”, arXiv:2603.13550 (2026).

Additional references

4 papers in this index state this conjecture (2011–2026). The statement above is taken from the most recent of them; the others are arXiv:2503.12201, arXiv:1304.6451, arXiv:1105.4163.

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