Convex hulls of surfaces in fourspace
Algebraic Geometry
2025-06-02 v1 Metric Geometry
Abstract
This is a case study of the algebraic boundary of convex hulls of varieties. We focus on surfaces in fourspace to showcase new geometric phenomena that neither curves nor hypersurfaces do. Our method is a detailed analysis of a general purpose formula by Ranestad and Sturmfels in the case of smooth real algebraic surfaces of low degree (that are rational over the complex numbers). We study both the complex and the real features of the algebraic boundary of Veronese, Del Pezzo and Bordiga surfaces.
Keywords
Cite
@article{arxiv.2209.01151,
title = {Convex hulls of surfaces in fourspace},
author = {Chiara Meroni and Kristian Ranestad and Rainer Sinn},
journal= {arXiv preprint arXiv:2209.01151},
year = {2025}
}
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