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PODS
2006
ACM
196views Database» more  PODS 2006»
16 years 6 months ago
The containment problem for REAL conjunctive queries with inequalities
Query containment is a fundamental algorithmic problem in database query processing and optimization. Under set semantics, the query-containment problem for conjunctive queries ha...
T. S. Jayram, Phokion G. Kolaitis, Erik Vee
DATE
1999
IEEE
135views Hardware» more  DATE 1999»
15 years 11 months ago
Combinational Equivalence Checking Using Satisfiability and Recursive Learning
The problem of checking the equivalence of combinational circuits is of key significance in the verification of digital circuits. In recent years, several approaches have been pro...
João P. Marques Silva, Thomas Glass
LICS
2012
IEEE
13 years 9 months ago
Graph Logics with Rational Relations and the Generalized Intersection Problem
Abstract—We investigate some basic questions about the interaction of regular and rational relations on words. The primary motivation comes from the study of logics for querying ...
Pablo Barceló, Diego Figueira, Leonid Libki...
ICIP
2002
IEEE
16 years 8 months ago
Error concealment using a diffusion based method
In this paper, we present a novel PDE based error concealment algorithm. We formulate the error concealment problem as a sequential optimization problem with both smoothing and or...
Hao Jiang, Cecilia Moloney
COMPUTING
2008
174views more  COMPUTING 2008»
15 years 6 months ago
Multilevel algorithms for Rannacher-Turek finite element approximation of 3D elliptic problems
Generalizing the approach of a previous work [15] the authors present multilevel preconditioners for three-dimensional (3D) elliptic problems discretized by a family of Rannacher ...
Ivan Georgiev, Johannes Kraus, Svetozar Margenov