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» On sets not belonging to algebras
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VLDB
1997
ACM
112views Database» more  VLDB 1997»
14 years 1 months ago
Selectivity Estimation Without the Attribute Value Independence Assumption
The result size of a query that involves multiple attributes from the same relation depends on these attributes’ joint data distribution,i.e., the frequencies of all combination...
Viswanath Poosala, Yannis E. Ioannidis
ICFEM
2007
Springer
14 years 25 days ago
Testing for Refinement in CSP
Abstract. CSP is a well-established formalism for modelling and verification of concurrent reactive systems based on refinement. Consolidated denotational models and an effective t...
Ana Cavalcanti, Marie-Claude Gaudel
SAS
1991
Springer
102views Formal Methods» more  SAS 1991»
14 years 15 days ago
Equational Logics
d Abstract) Marcelo Fiore1 Chung-Kil Hur2,3 Computer Laboratory University of Cambridge Cambridge, UK We introduce an abstract general notion of system of equations between terms,...
Yong Sun
VLDB
1987
ACM
106views Database» more  VLDB 1987»
14 years 14 days ago
A Dual Space Representation for Geometric Data
Thie paper presents a representation echeme for polyhedral objects in arbitrary dimensions. Each object ie represented as the algebraic sum of convex polyhedra (cells). Each cell ...
Oliver Günther, Eugene Wong
EKAW
2006
Springer
13 years 11 months ago
A Formal Approach to Qualitative Reasoning on Topological Properties of Networks
Abstract. Qualitative reasoning uses a limited set of relevant distinctions of the domain to allow a flexible way of representing and reasoning about it. This work presents a conce...
Andrea Rodríguez, Claudio Gutierrez