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» Universality in two dimensions
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SYNTHESE
2008
74views more  SYNTHESE 2008»
14 years 10 months ago
Could there be exactly two things?
Many philosophers think that, necessarily, any material objects have a fusion (let's call that doctrine "Universalism"). In this paper I point out a couple of strang...
Juan Comesaña
EH
2004
IEEE
98views Hardware» more  EH 2004»
15 years 2 months ago
Self-Replication of 3D Universal Structures
After a survey of some realizations of self-replicating machines, this paper presents the construction based selfreplication of universal 3D structures. This self-replication proc...
André Stauffer, Daniel Mange, Enrico Petrag...
STOC
2003
ACM
117views Algorithms» more  STOC 2003»
15 years 10 months ago
Distinct distances in three and higher dimensions
Improving an old result of Clarkson et al., we show that the number of distinct distances determined by a set P of n points in three-dimensional space is (n77/141) = (n0.546 ), fo...
Boris Aronov, János Pach, Micha Sharir, G&a...
PODS
2009
ACM
130views Database» more  PODS 2009»
15 years 11 months ago
Secondary indexing in one dimension: beyond b-trees and bitmap indexes
Let be a finite, ordered alphabet, and consider a string x = x1x2 . . . xn n . A secondary index for x answers alphabet range queries of the form: Given a range [al, ar] , retu...
Rasmus Pagh, Srinivasa Rao Satti
SOFSEM
2009
Springer
15 years 7 months ago
Weaknesses of Cuckoo Hashing with a Simple Universal Hash Class: The Case of Large Universes
Cuckoo hashing was introduced by Pagh and Rodler in 2001 [12]. A set S of n keys is stored in two tables T1 and T2 each of which has m cells of capacity 1 such that constant access...
Martin Dietzfelbinger, Ulf Schellbach