Sciweavers

LATA
2009
Springer
13 years 11 months ago
Recent Developments in Algorithmic Teaching
Abstract. The present paper surveys recent developments in algorithmic teaching. First, the traditional teaching dimension model is recalled. Starting from the observation that the...
Frank J. Balbach, Thomas Zeugmann
LATA
2009
Springer
13 years 11 months ago
Decision Problems for Convex Languages
We examine decision problems for various classes of convex languages, previously studied by Ang and Brzozowski under the name “continuous languages”. We can decide whether a la...
Janusz A. Brzozowski, Jeffrey Shallit, Zhi Xu
LATA
2009
Springer
13 years 11 months ago
Automata on Gauss Words
In this paper we investigate the computational complexity of knot theoretic problems and show upper and lower bounds for planarity problem of signed and unsigned knot diagrams repr...
Alexei Lisitsa, Igor Potapov, Rafiq Saleh
LATA
2009
Springer
13 years 11 months ago
On the Average Size of Glushkov's Automata
Abstract. Glushkov’s algorithm builds an ε-free nondeterministic automaton from a given regular expression. In the worst case, its number of states is linear and its number of t...
Cyril Nicaud
LATA
2009
Springer
13 years 11 months ago
From Gene Trees to Species Trees through a Supertree Approach
Abstract. Gene trees are leaf-labeled trees inferred from molecular sequences. Due to duplication events arising in genome evolution, gene trees usually have multiple copies of som...
Celine Scornavacca, Vincent Berry, Vincent Ranwez
LATA
2009
Springer
13 years 11 months ago
Membership Testing: Removing Extra Stacks from Multi-stack Pushdown Automata
We show that fixed membership testing for many interesting subclasses of multi-pushdown machines is no harder than for pushdowns with single stack. The models we consider are MVPA...
Nutan Limaye, Meena Mahajan
LATA
2009
Springer
13 years 11 months ago
Tiling the Plane with a Fixed Number of Polyominoes
Deciding whether a finite set of polyominoes tiles the plane is undecidable by reduction from the Domino problem. In this paper, we prove that the problem remains undecidable if t...
Nicolas Ollinger
LATA
2009
Springer
13 years 11 months ago
On Extended Regular Expressions
d abstract) Benjamin Carle, Paliath Narendran and Colin Scheriff Dept. of Computer Science University at Albany–SUNY Albany, NY 12222 June 19, 2007 In this paper we extend the ...
Benjamin Carle, Paliath Narendran
LATA
2009
Springer
13 years 11 months ago
Rigid Tree Automata
We introduce the class of Rigid Tree Automata (RTA), an extension of standard bottom-up automata on ranked trees with distinguished states called rigid. Rigid states define a rest...
Florent Jacquemard, Francis Klay, Camille Vacher