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» Decidable Extensions of Church's Problem
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AIML
2008
13 years 11 months ago
Undecidability for arbitrary public announcement logic
Arbitrary public announcement logic (APAL) is an extension of multi-agent epistemic logic that allows agents' knowledge states to be updated by the public announcement of (pos...
Tim French, Hans P. van Ditmarsch
CORR
2010
Springer
105views Education» more  CORR 2010»
13 years 9 months ago
Nominal Unification from a Higher-Order Perspective
Abstract. Nominal Logic is an extension of first-order logic with equality, name-binding, name-swapping, and freshness of names. Contrarily to higher-order logic, bound variables a...
Jordi Levy, Mateu Villaret
CORR
2011
Springer
156views Education» more  CORR 2011»
13 years 4 months ago
Impossibility of Succinct Quantum Proofs for Collision-Freeness
We show that any quantum algorithm to decide whether a function f : [n] → [n] is a permutation or far from a permutation must make Ω n1/3 /w queries to f, even if the algorith...
Scott Aaronson
CONCUR
2009
Springer
14 years 1 months ago
Time-Bounded Verification
Abstract. We study the decidability and complexity of verification problems for timed automata over time intervals of fixed, bounded length. One of our main results is that time-bo...
Joël Ouaknine, Alexander Rabinovich, James Wo...
STACS
2010
Springer
14 years 4 months ago
The Recognition of Tolerance and Bounded Tolerance Graphs
Tolerance graphs model interval relations in such a way that intervals can tolerate a certain degree of overlap without being in conflict. This subclass of perfect graphs has bee...
George B. Mertzios, Ignasi Sau, Shmuel Zaks