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A Sylvester-Gallai result for concurrent lines in the complex plane
- Publication Year :
- 2020
-
Abstract
- We show that if a set of points in $\mathbb{C}^2$ lies on a family of $m$ concurrent lines, and if one of those lines contains more than $m-2$ points, then there is a line passing through exactly two points of the set. The bound $m-2$ in our result is optimal. Our main theorem resolves a conjecture of Frank de Zeeuw, and generalizes a result of Kelly and Nwankpa.<br />Comment: 16 pages, 6 figures; several revisions added for overall clarity
- Subjects :
- Mathematics - Combinatorics
52C30, 51A45
Subjects
Details
- Database :
- arXiv
- Publication Type :
- Report
- Accession number :
- edsarx.2007.03601
- Document Type :
- Working Paper