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JACM
2010
116views more  JACM 2010»
14 years 10 months ago
The complexity of temporal constraint satisfaction problems
A temporal constraint language is a set of relations that has a first-order definition in (Q, <), the dense linear order of the rational numbers. We present a complete comple...
Manuel Bodirsky, Jan Kára
JACM
2010
137views more  JACM 2010»
14 years 10 months ago
Reconciling description logics and rules
Description logics (DLs) and rules are formalisms that emphasize different aspects of knowledge representation: whereas DLs are focused on specifying and reasoning about conceptual...
Boris Motik, Riccardo Rosati
ECCC
2000
101views more  ECCC 2000»
14 years 12 months ago
Simplified derandomization of BPP using a hitting set generator
Abstract. A hitting-set generator is a deterministic algorithm that generates a set of strings such that this set intersects every dense set that is recognizable by a small circuit...
Oded Goldreich, Salil P. Vadhan, Avi Wigderson
JACM
2010
120views more  JACM 2010»
14 years 6 months ago
The structure of inverses in schema mappings
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, Alan Nash
SODA
2010
ACM
177views Algorithms» more  SODA 2010»
15 years 9 months ago
On the Exact Space Complexity of Sketching and Streaming Small Norms
We settle the 1-pass space complexity of (1 ? )approximating the Lp norm, for real p with 1 p 2, of a length-n vector updated in a length-m stream with updates to its coordinate...
Daniel M. Kane, Jelani Nelson, David P. Woodruff