El-Yaniv et al. presented an optimal on-line algorithm for the unidirectional currency conversion problem based on the threat-based strategy. Later, al-Binali pointed out that this...
We present a new efficient algorithm for exact matching in encoded DNA sequences and on binary strings. Our algorithm combines a multi-pattern version of the Bndm algorithm and a s...
In this paper we introduce a notion of a regular expression over infinite alphabets and show that a language is definable by an infinite alphabet regular expression if and only if ...
We consider the collection of all spanning trees of a graph with distance between them based on the size of the symmetric difference of their edge sets. A central spanning tree o...
d Abstract] Luca Allulli, Giorgio Ausiello, and Luigi Laura Dip. di Informatica e Sistemistica Universit`a di Roma “La Sapienza” Via Salaria, 113 - 00198 Roma Italy.