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DLT
2004
14 years 25 days ago
An NP-Complete Fragment of LTL
A fragment of linear time temporal logic (LTL) is presented. It is proved that the satisfiability problem for this fragment is NPcomplete. The fragment is larger than previously kn...
Anca Muscholl, Igor Walukiewicz
DLT
2004
14 years 25 days ago
Relating Tree Series Transducers and Weighted Tree Automata
Bottom-up tree series transducers (tst) over the semiring A are implemented with the help of bottom-up weighted tree automata (wta) over an extension of A. Therefore bottom-up D-w...
Andreas Maletti
DLT
2004
14 years 25 days ago
An Efficient Pattern Matching Algorithm on a Subclass of Context Free Grammars
There is a close relationship between formal language theory and data compression. Since 1990's various types of grammar-based text compression algorithms have been introduced...
Shunsuke Inenaga, Ayumi Shinohara, Masayuki Takeda
DLT
2004
14 years 25 days ago
The Power of Maximal Parallelism in P Systems
Oscar H. Ibarra, Hsu-Chun Yen, Zhe Dang
DLT
2004
14 years 25 days ago
Some New Directions and Questions in Parameterized Complexity
Recently there have been some new initiatives in the field of parameterized complexity. In this paper, we will report on some of these, concentrating on some open questions, and al...
Rodney G. Downey, Catherine McCartin
DLT
2004
14 years 25 days ago
On Competence in CD Grammar Systems
Abstract. We investigate the generative power of cooperating distributed grammar systems (CDGSs), if the cooperation protocol is based on the level of competence on the underlying ...
Maurice H. ter Beek, Erzsébet Csuhaj-Varj&u...
DLT
2004
14 years 25 days ago
Recognizable Sets of Graphs, Hypergraphs and Relational Structures: A Survey
New results on the recognizability of sets of finite graphs, hypergraphs and relational structures are presented. The general framework of this research which associates tightly a...
Bruno Courcelle
DLT
2004
14 years 25 days ago
On the Maximum Coefficients of Rational Formal Series in Commuting Variables
We study the maximum function of any R+-rational formal series S in two commuting variables, which assigns to every integer n N, the maximum coefficient of the monomials of degree...
Christian Choffrut, Massimiliano Goldwurm, Violett...