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LICS
2002
IEEE
13 years 11 months ago
Tree Extension Algebras: Logics, Automata, and Query Languages
We study relations on trees defined by first-order constraints over a vocabulary that includes the tree extension relation Ì Ì ¼, holding if and only if every branch of Ì ex...
Michael Benedikt, Leonid Libkin
POPL
2006
ACM
14 years 6 months ago
Polymorphic regular tree types and patterns
We propose a type system based on regular tree grammars, where algebraic datatypes are interpreted in a structural way. Thus, the same constructors can be reused for different typ...
Jerome Vouillon
ENTCS
2000
123views more  ENTCS 2000»
13 years 5 months ago
Defining Standard Prolog in Rewriting Logic
The coincidence between the model-theoretic and the procedural semantics of SLDresolution does not carry over to a Prolog system that also implements non-logical features like cut...
Marija Kulas, Christoph Beierle
FUIN
2010
98views more  FUIN 2010»
13 years 3 months ago
On the Borel Complexity of MSO Definable Sets of Branches
An infinite binary word can be identified with a branch in the full binary tree. We consider sets of branches definable in monadic second-order logic over the tree, where we allow ...
Mikolaj Bojanczyk, Damian Niwinski, Alexander Rabi...
CONCUR
2004
Springer
13 years 11 months ago
Characterizing EF and EX Tree Logics
We describe the expressive power of temporal branching time logics that use the modalities EX and EF. We give a forbidden pattern characterization of the tree languages definable...
Mikolaj Bojanczyk, Igor Walukiewicz