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» Preservation Theorems in Finite Model Theory
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121
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LCC
1994
214views Algorithms» more  LCC 1994»
15 years 4 months ago
Preservation Theorems in Finite Model Theory
Eric Rosen, Scott Weinstein
98
Voted
ENTCS
2006
172views more  ENTCS 2006»
15 years 12 days ago
Locality of Queries and Transformations
Locality is a standard notion of finite model theory. There are two well known flavors of it, based on Hanf's and Gaifman's theorems. Essentially they say that structure...
Leonid Libkin
111
Voted
PODS
2004
ACM
139views Database» more  PODS 2004»
16 years 15 days ago
On Preservation under Homomorphisms and Unions of Conjunctive Queries
Unions of conjunctive queries, also known as select-project-join-union queries, are the most frequently asked queries in relational database systems. These queries are definable b...
Albert Atserias, Anuj Dawar, Phokion G. Kolaitis
93
Voted
AML
2007
87views more  AML 2007»
15 years 15 days ago
Preservation theorems for bounded formulas
In this paper we naturally define when a theory has bounded quantifier elimination, or is bounded model complete. We give several equivalent conditions for a theory to have each...
Morteza Moniri
BIRTHDAY
1997
Springer
15 years 4 months ago
Syntax vs. Semantics on Finite Structures
Abstract. Logic preservation theorems often have the form of a syntax/semantics correspondence. For example, the Los-Tarski theorem asserts that a rst-order sentence is preserved b...
Natasha Alechina, Yuri Gurevich