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Three formulas for CSM classes of open quiver loci
Moriah Elkin · 2026-05-25 · via math updates on arXiv.org

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Abstract:In the space of equioriented type $A$ quiver representations, we define subvarieties called "open quiver loci" by placing strict rank conditions on the maps within representations. The closures of these subvarieties are the quiver loci, whose equivariant cohomology classes are the quiver polynomials of Buch and Fulton. We present one geometric formula and two combinatorial formulas that compute equivariant Chern-Schwartz-MacPherson (CSM) classes of open quiver loci; these classes refine the data of the quiver polynomials. The second combinatorial formula is in terms of "chained generic pipe dreams," which modify the pipe dreams of Bergeron and Billey to more strongly resemble the lacing diagrams of Abeasis and Del Fra.
Comments: 19 pages. References added since version 3. See version 2 for an extended abstract submitted to FPSAC 2026
Subjects: Combinatorics (math.CO); Algebraic Geometry (math.AG)
Cite as: arXiv:2511.17723 [math.CO]
  (or arXiv:2511.17723v4 [math.CO] for this version)
  https://doi.org/10.48550/arXiv.2511.17723

arXiv-issued DOI via DataCite

Submission history

From: Moriah Elkin [view email]
[v1] Fri, 21 Nov 2025 19:18:50 UTC (34 KB)
[v2] Sat, 29 Nov 2025 15:23:05 UTC (34 KB)
[v3] Mon, 9 Mar 2026 18:01:58 UTC (189 KB)
[v4] Fri, 22 May 2026 17:08:06 UTC (190 KB)