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MFCS
2004
Springer
9 years 9 months ago
Sublogarithmic Ambiguity
Abstract. So far the least growth rate known for a divergent inherent ambiguity function was logarithmic. This paper shows that for each computable divergent total non-decreasing f...
Klaus Wich
MFCS
2004
Springer
9 years 9 months ago
Captive Cellular Automata
Abstract. We introduce a natural class of cellular automata characterised by a property of the local transition law without any assumption on the states set. We investigate some al...
Guillaume Theyssier
MFCS
2004
Springer
9 years 9 months ago
Simulating 3D Cellular Automata with 2D Cellular Automata
The purpose of this article is to describe a way to simulate any 3-dimensional cellular automaton with a 2-dimensional cellular automaton. We will present the problems that arise w...
Victor Poupet
MFCS
2004
Springer
9 years 9 months ago
The Dual of Concatenation
A binary language-theoretic operation is proposed, which is dual to the concatenation of languages in the same sense as the universal quantifier in logic is dual to the existenti...
Alexander Okhotin
MFCS
2004
Springer
9 years 9 months ago
Ubiquitous Parameterization - Invitation to Fixed-Parameter Algorithms
Abstract. Problem parameters are ubiquitous. In every area of computer science, we find all kinds of “special aspects” to the problems encountered. Hence, the study of paramet...
Rolf Niedermeier
MFCS
2004
Springer
9 years 9 months ago
Complexity of Decision Problems for Simple Regular Expressions
We study the complexity of the inclusion, equivalence, and intersection problem for simple regular expressions arising in practical XML schemas. These basically consist of the conc...
Wim Martens, Frank Neven, Thomas Schwentick
MFCS
2004
Springer
9 years 9 months ago
A Generalization of Repetition Threshold
Brandenburg and (implicitly) Dejean introduced the concept of repetition threshold: the smallest real number α such that there exists an infinite word over a k-letter alphabet t...
Lucian Ilie, Pascal Ochem, Jeffrey Shallit
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