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CSL
1995
Springer
15 years 3 months ago
The Railroad Crossing Problem: An Experiment with Instantaneous Actions and Immediate Reactions
We give an evolving algebra solution for the well-known railroad crossing problem and use the occasion to experiment with agents that perform instantaneous actions in continuous t...
Yuri Gurevich, James K. Huggins
CSL
2008
Springer
15 years 1 months ago
Model Transformations in Decidability Proofs for Monadic Theories
We survey two basic techniques for showing that the monadic second-order theory of a structure is decidable. In the first approach, one deals with finite fragments of the theory (g...
Wolfgang Thomas
CSL
2010
Springer
15 years 1 months ago
A Formalisation of the Normal Forms of Context-Free Grammars in HOL4
We describe the formalisation of the normal forms of context-free grammars (CFGs) using the HOL4 theorem prover. These straightforward pen and paper proofs easily understood from t...
Aditi Barthwal, Michael Norrish
CSL
2008
Springer
15 years 1 months ago
Undecidability of Type-Checking in Domain-Free Typed Lambda-Calculi with Existence
Abstract. This paper shows undecidability of type-checking and typeinference problems in domain-free typed lambda-calculi with existential types: a negation and conjunction fragmen...
Koji Nakazawa, Makoto Tatsuta, Yukiyoshi Kameyama,...
CSL
2006
Springer
14 years 12 months ago
Infinite State Model-Checking of Propositional Dynamic Logics
Model-checking problems for PDL (propositional dynamic logic) and its extension PDL (which includes the intersection operator on programs) over various classes of infinite state sy...
Stefan Göller, Markus Lohrey