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ICALP
2005
Springer
14 years 1 months ago
Logics for Unranked Trees: An Overview
Labeled unranked trees are used as a model of XML documents, and logical languages for them have been studied actively over the past several years. Such logics have different purpo...
Leonid Libkin
IJFCS
2007
80views more  IJFCS 2007»
13 years 7 months ago
Bisimulation Minimization of Tree Automata
We extend an algorithm by Paige and Tarjan that solves the coarsest stable refinement problem to the domain of trees. The algorithm is used to minimize non-deterministic tree auto...
Parosh Aziz Abdulla, Johanna Högberg, Lisa Ka...
FCT
2007
Springer
14 years 1 months ago
On the Topological Complexity of Weakly Recognizable Tree Languages
We show that the family of tree languages recognized by weak alternating automata is closed by three set theoretic operations that correspond to sum, multiplication by ordinals <...
Jacques Duparc, Filip Murlak
CAV
2006
Springer
129views Hardware» more  CAV 2006»
13 years 11 months ago
Languages of Nested Trees
We study languages of nested trees--structures obtained by augmenting trees with sets of nested jump-edges. These graphs can naturally model branching behaviors of pushdown program...
Rajeev Alur, Swarat Chaudhuri, P. Madhusudan
WIA
2009
Springer
14 years 4 days ago
On Extremal Cases of Hopcroft's Algorithm
In this paper we consider the problem of minimization of deterministic finite automata (DFA) with reference to Hopcroft’s algorithm. Hopcroft’s algorithm has several degrees o...
Giusi Castiglione, Antonio Restivo, Marinella Scio...