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This collection of 15 papers honors the career of Symeon Bozapalidis. The focus is on his teaching subjects: algebra, linear algebra, mathematical logic, number theory, automata theory, tree languages and series, algebraic semantics, and fuzzy languages.

Presents the proceedings of the 19th International Colloquium on Automata, Languages, and Programming, held at Wien, Austria, in July 1992. The conference covered all aspects of theoretical computer science, including such topics as computability, automata, formal languages and cryptography.

This volume constitutes the thoroughly refereed post-proceedings of the 5th International Conference on Developments in Language Theory, DLT 2001, held in Vienna, Austria, in July 2001. The 24 revised full papers presented together with 10 revised invited papers were carefully selected during two rounds of reviewing and revision from a total of 64 papers submitted. Among the topics covered are grammars and acceptors, efficient algorithms for languages, combinatorial and algebraic properties, decision problems, relations to complexity theory, logic, picture description and analysis, DNA...

The purpose of this Handbook is to highlight both theory and applications of weighted automata. Weighted ?nite automata are classical nondeterministic ?nite automata in which the transitions carry weights. These weights may model, e. g., the cost involved when executing a transition, the amount of resources or time neededforthis, ortheprobabilityorreliabilityofitssuccessful execution. The behavior of weighted ?nite automata can then be considered as the function (suitably de?ned) associating with each word the weight of its execution. Clearly, weights can also be added to classical automata...