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» Computably Enumerable Sets and Quasi-Reducibility
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IPL
2006
117views more  IPL 2006»
13 years 9 months ago
P systems without multiplicities of symbol-objects
In this paper we investigate P systems whose compartments contain sets of symbolobjects rather than multisets of objects, as it is common in membrane computing. If the number of m...
Artiom Alhazov
ICALP
2001
Springer
14 years 2 months ago
Combinatorics of Periods in Strings
We consider the set Gn of all period sets of strings of length n over a finite alphabet. We show that there is redundancy in period sets and introduce the notion of an irreducibl...
Eric Rivals, Sven Rahmann
APAL
2008
69views more  APAL 2008»
13 years 10 months ago
Lowness properties and approximations of the jump
We study and compare two combinatorial lowness notions: strong jump-traceability and well-approximability of the jump, by strengthening the notion of jump-traceability and super-l...
Santiago Figueira, André Nies, Frank Stepha...
JUCS
2002
81views more  JUCS 2002»
13 years 9 months ago
Membrane Computing: The Power of (Rule) Creation
: We consider a uniform way of treating objects and rules in P systems: we start with multisets of rules, which are consumed when they are applied, but the application of a rule ma...
Fernando Arroyo, Angel V. Baranda, Juan Castellano...
FSS
2008
127views more  FSS 2008»
13 years 10 months ago
On the computing power of fuzzy Turing machines
We work with fuzzy Turing machines (FTMs) and we study the relationship between this computational model and classical recursion concepts such as computable functions, recursively...
Benjamín René Callejas Bedregal, San...