OWR-12697711-006 · Complete proof

Irreducibility of the Exposed-Point Variety of a Discotope

Manuscript 27 October 2026 · Online 27 October 2026

math.MGmath.AGUnrefereed preprint

Abstract

A discotope is a finite Minkowski sum of linear images of Euclidean unit balls. We prove that, when every summand has intrinsic dimension at least two, the complex Zariski closure E of its exposed points is irreducible, without a genericity assumption. The proof uses the real-analytic support-point map on the connected complement of finitely many subspaces of codimension at least two. Under an explicit generic maximal-rank condition on all summand spans, every boundary point expressible as a sum of summand-boundary points is a limit of exposed points; hence the purely nonlinear part S equals E and is irreducible. This proves Gesmundo-Meroni Conjecture 8.2 (The Geometry of Discotopes, 2022) and Conjecture 1 in Meroni's contribution to Oberwolfach Report 15/2023, exactly frozen UnsolvedMath record OWR-12697711-006. Segment summands are excluded, and S=E may fail for nongeneric representations. The entire complex critical locus, birationality, degree, zonoid recognition and the adjacent rank-one convexity question are not resolved here. This five-page English preprint credits the existing support-face description and standard analytic inputs. It was developed with AI assistance and self-audited; 255 exact regression checks supplement the written proof. It is unrefereed, without independent review, formal proof-assistant verification or an absolute-priority claim.

Record

Affiliation
Mercury Software GmbH
Result
Complete proof
Categories
math.MG · math.AG
Manuscript
27 October 2026
Online release
27 October 2026
Version
1.0
License
Creative Commons Attribution 4.0 International

Files and verification

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Citation

Alper Ferudun, “Irreducibility of the Exposed-Point Variety of a Discotope,” EulerSolve Research Papers, OWR-12697711-006, 2026. https://doi.org/10.5281/zenodo.23689704.

BibTeX
@misc{ferudun2026discotopeirreducibility,
  author = {Ferudun, Alper},
  title = {Irreducibility of the Exposed-Point Variety of a Discotope},
  year = {2026},
  howpublished = {EulerSolve Research Papers},
  url = {https://eulersolve.org/papers/owr-12697711-006/},
  doi = {10.5281/zenodo.23689704},
  note = {OWR-12697711-006; unrefereed preprint}
}

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