Forward and backward simulations I.: untimed systems
Information and Computation
Weak alternating automata are not that weak
ACM Transactions on Computational Logic (TOCL)
Information and Computation
Communication and Concurrency
ICALP '91 Proceedings of the 18th International Colloquium on Automata, Languages and Programming
TACAS '00 Proceedings of the 6th International Conference on Tools and Algorithms for Construction and Analysis of Systems: Held as Part of the European Joint Conferences on the Theory and Practice of Software, ETAPS 2000
A Hierarchy of Polynomial-Time Computable Simulations for Automata
CONCUR '02 Proceedings of the 13th International Conference on Concurrency Theory
Efficient Büchi Automata from LTL Formulae
CAV '00 Proceedings of the 12th International Conference on Computer Aided Verification
CAV '02 Proceedings of the 14th International Conference on Computer Aided Verification
Checking for Language Inclusion Using Simulation Preorders
CAV '91 Proceedings of the 3rd International Workshop on Computer Aided Verification
Verification of Fair Transisiton Systems
CAV '96 Proceedings of the 8th International Conference on Computer Aided Verification
Minimizing Interacting Finite State
Minimizing Interacting Finite State
Environment modeling and efficient state reachability checking
Environment modeling and efficient state reachability checking
Fair Simulation Relations, Parity Games, and State Space Reduction for Büchi Automata
SIAM Journal on Computing
Simulation relations for alternating Büchi automata
Theoretical Computer Science
Minimizing nfa's and regular expressions
Journal of Computer and System Sciences
Multipebble simulations for alternating automata
CONCUR'10 Proceedings of the 21st international conference on Concurrency theory
Minimizing generalized büchi automata
CAV'06 Proceedings of the 18th international conference on Computer Aided Verification
Advanced automata minimization
POPL '13 Proceedings of the 40th annual ACM SIGPLAN-SIGACT symposium on Principles of programming languages
Hi-index | 0.00 |
We study novel simulation-like preorders for quotienting nondeterministic Büchi automata. We define fixed-word delayed simulation, a new preorder coarser than delayed simulation. We argue that fixed-word simulation is the coarsest forward simulation-like preorder which can be used for quotienting Büchi automata, thus improving our understanding of the limits of quotienting. Also, we show that computing fixed-word simulation is PSPACE-complete. On the practical side, we introduce proxy simulations, which are novel polynomial-time computable preorders sound for quotienting. In particular, delayed proxy simulation induce quotients that can be smaller by an arbitrarily large factor than direct backward simulation. We derive proxy simulations as the product of a theory of refinement transformers: A refinement transformer maps preorders nondecreasingly, preserving certain properties. We study under which general conditions refinement transformers are sound for quotienting.