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The Expressive Power of Clocks (1995)  (Make Corrections)  (24 citations)
Thomas A. Henzinger, Peter W. Kopke, Howard Wong-Toi
Automata, Languages and Programming



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Abstract: . We investigate the expressive power of timing restrictions on labeled transition systems. In particular, we show how constraints on clock variables together with a uniform liveness condition --- the divergence of time --- can express Buchi, Muller, Streett, Rabin, and weak and strong fairness conditions on a given labeled transition system. We then consider the effect, on both timed and time-abstract expressiveness, of varying the following parameters: time domain (discrete or dense),... (Update)

Context of citations to this paper:   More

.... have been devoted to the theoretical comprehension of timed automata: determinization [AFH94] minimization 92] power of clocks [ACH94,HKWT95] power of transitions [BDGP98] extensions of the model [DZ98,HRS98,CG00,BFH 01] logical characterizations [Wil94,HRS98]...

.... increases the class of data languages being recognized, as in timed automata each additional clock increases also the power of the automata [HKWT95] On the other hand, if the monoid and the alphabet are xed, then the hierarchy on registers collapse. Proposition 8 (1) The...

Cited by:   More
Real-time System = Discrete System + Clock Variables - Alur, Henzinger (1997)   (Correct)
Timed Automata with Periodic Clock Constraints - Choffrut, Goldwurm (1999)   (Correct)
Classes of Timed Automata and the Undecidability of Universality - Moura, Pinto (2001)   (Correct)

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0.1:   On First Order Interval Temporal Logic - Dutertre (1995)   (Correct)

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0.3:   Verification Methods for the Divergent Runs Of Clock Systems - A.Henzinger, W.Kopke (1994)   (Correct)
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19:   Theoretical Computer Science (context) - Alur, Dill et al. - 1994
17:   Specifying Timed State Sequences in Powerful Decidable Logic and Timed Automata - Wilke - 1994
15:   A determinizable class of timed automata (context) - Alur, Fix et al. - 1994

BibTeX entry:   (Update)

T.A. Henzinger, P.W. Kopke, and H. Wong-Toi. The expressive power of clocks. In Proceedings 22 nd ICALP, volume 944 of Lecture Notes in Computer Science, pages 417--428. Springer-Verlag, 1995. http://citeseer.ist.psu.edu/henzinger95expressive.html   More

@inproceedings{ henzinger95expressive,
    author = "Thomas A. Henzinger and Peter W. Kopke and Howard Wong-Toi",
    title = "The Expressive Power of Clocks",
    booktitle = "Automata, Languages and Programming",
    pages = "417-428",
    year = "1995",
    url = "citeseer.ist.psu.edu/henzinger95expressive.html" }
Citations (may not include all citations):
666   Theoretical Computer Science (context) - Alur, Dill et al. - 1994
404   Symbolic model checking for real-time systems - Henzinger, Nicollin et al. - 1994
374   Automata on infinite objects (context) - Thomas - 1990
175   Logics and models of real time: a survey - Alur, Henzinger - 1992
147   Real-time logics: complexity and expressiveness - Alur, Henzinger - 1993
69   What good are digital clocks - Henzinger, Manna et al. - 1992
55   Verifying ET-LOTOS programs with KRONOS - Daws, Olivero et al. - 1994
36   The observational power of clocks - Alur, Courcoubetis et al. - 1994
35   Back to the future: towards a theory of timed regular langua.. - Alur, Henzinger - 1992
32   Sooner is safer than later - Henzinger - 1992
11   Real-time system = discrete system + clock variables - Alur, Henzinger - 1993
9   Verification methods for the divergent runs of clock systems - Henzinger, Kopke - 1994



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Documents on the same site (http://www.parades.rm.cnr.it/~howard/Publications/pubs.html):   More
HyTech: A Model Checker for Hybrid Systems - Henzinger, Ho, Wong-Toi (1997)   (Correct)
The Control of Dense Real-Time Discrete Event Systems - Wong-Toi, Hoffmann (1991)   (Correct)
The Control of Dense Real-Time Discrete Event Systems - Wong-Toi, Hoffmann (1995)   (Correct)

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