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» Self-Assembly of Infinite Structures
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STOC
2006
ACM
108views Algorithms» more  STOC 2006»
14 years 10 months ago
Gowers uniformity, influence of variables, and PCPs
Gowers [Gow98, Gow01] introduced, for d 1, the notion of dimension-d uniformity Ud (f) of a function f : G C, where G is a finite abelian group. Roughly speaking, if a function ...
Alex Samorodnitsky, Luca Trevisan
STOC
2007
ACM
83views Algorithms» more  STOC 2007»
14 years 10 months ago
Lattices that admit logarithmic worst-case to average-case connection factors
We demonstrate an average-case problem that is as hard as finding (n)-approximate shortest vectors in certain n-dimensional lattices in the worst case, where (n) = O( log n). The...
Chris Peikert, Alon Rosen
PODS
2004
ACM
158views Database» more  PODS 2004»
14 years 9 months ago
Composing Schema Mappings: Second-Order Dependencies to the Rescue
A schema mapping is a specification that describes how data structured under one schema (the source schema) is to be transformed into data structured under a different schema (the...
Ronald Fagin, Phokion G. Kolaitis, Lucian Popa, Wa...
ICSM
2009
IEEE
14 years 4 months ago
A combinatorial approach to building navigation graphs for dynamic web applications
Modeling the navigation structure of a dynamic web application is a challenging task because of the presence of dynamic pages. In particular, there are two problems to be dealt wi...
Wenhua Wang, Yu Lei, Sreedevi Sampath, Raghu Kacke...
CORR
2008
Springer
126views Education» more  CORR 2008»
13 years 11 months ago
Intrinsically Universal Cellular Automata
Abstract. We introduce a natural class of cellular automata characterised by a property of the local transition law without any assumption on the states set. We investigate some al...
Nicolas Ollinger