{"paper":{"title":"Isoptic surfaces of polyhedra","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"math.MG","authors_text":"G\\'eza Csima, Jen\\H{o} Szirmai","submitted_at":"2015-10-26T23:33:17Z","abstract_excerpt":"The theory of the isoptic curves is widely studied in the Euclidean plane $\\bE^2$ (see \\cite{CMM91} and \\cite{Wi} and the references given there). The analogous question was investigated by the authors in the hyperbolic $\\bH^2$ and elliptic $\\cE^2$ planes (see \\cite{CsSz1}, \\cite{CsSz2}, \\cite{CsSz5}), but in the higher dimensional spaces there are only a few result in this topic.\n  In \\cite{CsSz4} we gave a natural extension of the notion of the isoptic curves to the $n$-dimensional Euclidean space $\\bE^n$ $(n\\ge 3)$ which are called isoptic hypersurfaces. Now we develope an algorithm to dete"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.07718","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}