Program of the Fourth Workshop

DCFS 2002

Descriptional Complexity of Formal Systems

August 22-24, 2002, London, Ontario, Canada



Wednesday, August 21, 2002
16:00-20:00 Reception / Wine and Cheese

Thursday, August 22, 2002
09:00-10:00 Invited Lecture: J. Hartmanis (Ithaca, New York, USA):
The Separation Problems and Descriptional Complexity
10:00-10:30 Coffee Break
10:30-11:00 C. Grozea (Bucharest, Romania):
NP Predicates Computable in the Weakest Level of the Grzegorczyck Hierarchy
11:00-11:30 J.-M. Champarnaud, G. Hansel, T. Paranthoën, D. Ziadi (Rouen, France):
NFAs Bitstream-Based Random Generation
11:30-12:00 M.-J. Nederhof (Groningen, The Netherlands), G. Satta (Padova, Italy):
Probabilistic Parsing Strategies
12:00-12:30 L. Kari (London, Ontario, Canada), S. Konstantinidis (Halifax, Nova Scotia, Canada):
Descriptional Complexity of Error/Edit Systems
12:30-14:00 Lunch
14:00-15:00 Invited Lecture: K. Ellul, J. Shallit, M.-W. Wang (Waterloo, Ontario, Canada):
Regular Expressions: New Results and Open Problems
15:00-15:15 Coffee Break
15:15-15:45 A. Martinez (Waterloo, Ontario, Canada):
Efficient Computation of Regular Expressions from Unary NFAs
15:45-16:15 A. Okhotin (Kingston, Ontario, Canada):
State Complexity of Linear Conjunctive Languages
16:15-16:45 M. Domaratzki, K. Salomaa (Kingston, Ontario, Canada):
State Complexity of Shuffle on Trajectories
16:45-17:15 H. Bordihn (Potsdam, Germany), M. Holzer (Munich, Germany), M. Kutrib (Giessen, Germany):
Economy of Description for Basic Constructions on Rational Transductions
17:30-18:30 Business Meeting of IFIP Working Group 1.2 Descriptional Complexity

Friday, August 23, 2002
09:00-10:00 Invited Lecture: M. Kappes (Basking Ridge, New Jersey, USA):
On Possible Extensions and Relationships Between Software Reliability, Software Metrics and Descriptional Complexity
10:00-10:25 Discussion - chaired by C. Kintala
10:25-10:45 Coffee Break
10:45-11:35 Invited Tutorial: E. Csuhaj-Varju (Budapest, Hungary):
Descriptional Complexity Issues in Grammar Systems
11:35-12:05 M. Madhu (Madras, India):
Complexity Issues in Rewriting P Systems
14:00 Excursion / Barbecue

Saturday, August 24, 2002
09:00-10:00 Invited Lecture: L. Kari (London, Ontario, Canada):
Self-Assembly and Computation
10:00-10:30 Coffee Break
10:30-11:00 A. Malcher (Frankfurt, Germany):
On One-Way Cellular Automata With a Fixed Number of Cells
11:00-11:30 M. G. Eramian (London, Ontario, Canada):
Efficient Simulation of Nondeterministic Weighted Finite Automata
11:30-12:00 I. McQuillan (London, Ontario, Canada):
Descriptional Complexity of Block-Synchronization Context-Free Grammars
12:00-12:30 F. Nießner (Frankfurt, Germany):
Büchi Automata and Their Degrees of Nondeterminism and Ambiguity
12:30-14:00 Lunch
14:00-15:00 Invited Lecture: S. Yu (London, Ontario, Canada):
Repetition Complexity of Words
15:00-15:15 Coffee Break
15:15-15:45 C. Câmpeanu (Charlottetown, Prince Edward Island, Canada):
How Many States Can a Minimal DFA Have That Accepts Words of Length Less Than or Equal to l ?
15:45-16:15 M. Sakthi Balan (Madras, India):
Complexity Issues in Binding-Blocking Automata
16:15-16:45 T. Y. Nishida (Toyama, Japan):
Descriptional Complexities of Grammars Over Alphabets With Finite Parameters
16:45-17:15 C. L. Miller (London, Ontario, Canada):
Context Derivation Sets and Context-Free Normal Forms


DCFS 2002 Homepage

Magdeburg, July 11, 2002
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