Finiteness conjecture for simple connected ordered matroids with prescribed broken-circuit topology

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Let d,kd,k be positive integers. For an ordered matroid MM, write BC<(M)‾\overline{BC_<(M)} for its reduced broken circuit complex, and let hd−1(BC<(M)‾)h_{d-1}(\overline{BC_<(M)}) denote its (d−1)(d-1)-st hh-number. Finiteness conjecture. The number of isomorphism classes of simple connected, rank dd ordered matroids MM satisfying

hd−1(BC<(M)‾)=kh_{d-1}(\overline{BC_<(M)})=k

is finite. This is a finiteness assertion for ordered matroids whose reduced broken circuit complexes have prescribed topology; the supplied text does not indicate whether it has been proved or disproved.

References

Primary source

Federico Castillo and Jose Alejandro Samper, “Finiteness theorems for matroid complexes with prescribed topology”, arXiv:1809.00281 (2020).

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