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COMPGEOM
2009
ACM
13 years 11 months ago
An improved bound on the number of unit area triangles
We show that the number of unit-area triangles determined by a set of n points in the plane is O(n9/4+ε), for any ε > 0, improving the recent bound O(n44/19) of Dumitrescu et...
Roel Apfelbaum, Micha Sharir
COMPGEOM
2008
ACM
13 years 6 months ago
Extremal problems on triangle areas in two and three dimensions
The study of extremal problems on triangle areas was initiated in a series of papers by Erdos and Purdy in the early 1970s. In this paper we present new results on such problems, ...
Adrian Dumitrescu, Micha Sharir, Csaba D. Tó...
COMBINATORICS
2002
62views more  COMBINATORICS 2002»
13 years 4 months ago
New Lower Bounds for Heilbronn Numbers
The n-th Heilbronn number, Hn, is the largest value such that n points can be placed in the unit square in such a way that all possible triangles defined by any three of the point...
Francesc Comellas, J. Luis A. Yebra
CAGD
2004
76views more  CAGD 2004»
13 years 4 months ago
Mesh quality improvement and other properties in the four-triangles longest-edge partition
The four-triangles longest-edge (4T-LE) partition of a triangle t is obtained by joining the midpoint of the longest edge of t to the opposite vertex and to the midpoints of the t...
Angel Plaza, José P. Suárez, Miguel ...
IPCO
2007
114views Optimization» more  IPCO 2007»
13 years 6 months ago
Distinct Triangle Areas in a Planar Point Set
Erd˝os, Purdy, and Straus conjectured that the number of distinct (nonzero) areas of the triangles determined by n noncollinear points in the plane is at least n−1 2 , which is...
Adrian Dumitrescu, Csaba D. Tóth