Windmill Problem Solved via Projective Duality, Convex Hulls, and Parity Invariants — E8 Intelligence Research

FINDING: Windmill problem (IMO 2011 P2) — discrete geometry/combinatorics problem about a rotating line through finite point sets; solution uses projective duality, convex hull structure, and parity invariants to Author: Andrew Stewart Caldin, Independent Researcher, UK. Part of the E8 Intelligence Research series. Platform: e8intelligence.com

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Publication Details

Journal
Zenodo (CERN European Organization for Nuclear Research)
Published
2026-11-08
DOI
https://doi.org/10.5281/zenodo.24049095
Primary Topic
Advanced Combinatorial Mathematics
Type
preprint
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preprint

Windmill Problem Solved via Projective Duality, Convex Hulls, and Parity Invariants — E8 Intelligence Research

Andrew Stewart Caldin
10 links
Zenodo (CERN European Organization for Nuclear Research)
Advanced Combinatorial Mathematics
preprint

Windmill Problem Solved via Projective Duality, Convex Hulls, and Parity Invariants — E8 Intelligence Research

Andrew Stewart Caldin
preprint en

Abstract

FINDING: Windmill problem (IMO 2011 P2) — discrete geometry/combinatorics problem about a rotating line through finite point sets; solution uses projective duality, convex hull structure, and parity invariants to Author: Andrew Stewart Caldin, Independent Researcher, UK. Part of the E8 Intelligence Research series. Platform: e8intelligence.com

Zenodo (CERN European Organization for Nuclear Research)
Advanced Combinatorial Mathematics
DOIOpen Access PDFOpenAlex
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