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JCT
2011
89views more  JCT 2011»
13 years 7 months ago
On lines, joints, and incidences in three dimensions
We extend (and somewhat simplify) the algebraic proof technique of Guth and Katz [7], to obtain several sharp bounds on the number of incidences between lines and points in three ...
György Elekes, Haim Kaplan, Micha Sharir
TIT
2002
78views more  TIT 2002»
14 years 2 days ago
Improved upper bounds on sizes of codes
Let ( ) denote the maximum possible number of codewords in a binary code of length and minimum Hamming distance . For large values of , the best known upper bound, for fixed , is t...
Beniamin Mounits, Tuvi Etzion, Simon Litsyn
CORR
2007
Springer
99views Education» more  CORR 2007»
14 years 13 days ago
A parametric representation of totally mixed Nash equilibria
We present an algorithm to compute a parametric description of the totally mixed Nash equilibria of a generic game in normal form with a fixed structure. Using this representatio...
Gabriela Jeronimo, Daniel Perrucci, Juan Sabia
COMBINATORICA
2007
92views more  COMBINATORICA 2007»
14 years 13 days ago
Codes And Xor Graph Products
What is the maximum possible number, f3(n), of vectors of length n over {0, 1, 2} such that the Hamming distance between every two is even? What is the maximum possible number, g3...
Noga Alon, Eyal Lubetzky
COMBINATORICA
2006
91views more  COMBINATORICA 2006»
14 years 14 days ago
The Number Of Orientations Having No Fixed Tournament
Let T be a fixed tournament on k vertices. Let D(n, T) denote the maximum number of orientations of an n-vertex graph that have no copy of T. We prove that D(n, T) = 2tk-1(n) for ...
Noga Alon, Raphael Yuster
DCG
2010
84views more  DCG 2010»
14 years 16 days ago
On Lines and Joints
Let L be a set of n lines in Rd , for d 3. A joint of L is a point incident to at least d lines of L, not all in a common hyperplane. Using a very simple algebraic proof techniqu...
Haim Kaplan, Micha Sharir, Eugenii Shustin