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» An Existential Locality Theorem
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MKM
2009
Springer
14 years 9 days ago
Combined Decision Techniques for the Existential Theory of the Reals
Methods for deciding quantifier-free non-linear arithmetical conjectures over R are crucial in the formal verification of many realworld systems and in formalised mathematics. Wh...
Grant Olney Passmore, Paul B. Jackson
APAL
2010
92views more  APAL 2010»
13 years 3 months ago
The eskolemization of universal quantifiers
This paper is a sequel to the papers [4, 6] in which an alternative skolemization method called ekolemization was introduced that, when applied to the strong existential quantifie...
Rosalie Iemhoff
AAAI
2000
13 years 7 months ago
A Game-Theoretic Approach to Constraint Satisfaction
We shed light on the connections between different approaches to constraint satisfaction by showing that the main consistency concepts used to derive tractability results for cons...
Phokion G. Kolaitis, Moshe Y. Vardi
BIRTHDAY
1997
Springer
13 years 10 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
PODS
2004
ACM
139views Database» more  PODS 2004»
14 years 5 months 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