By Ioan I. Ardelean (auth.), Gheorghe PĂun, Grzegorz Rozenberg, Arto Salomaa, Claudio Zandron (eds.)

ISBN-10: 3540006117

ISBN-13: 9783540006114

ISBN-10: 3540364900

ISBN-13: 9783540364900

This booklet constitutes the completely refereed post-proceedings of the overseas Workshop on Membrane Computing, WMC-CdeA 2002, held in Curtea de Arges, Romania, in August 2002.

The 29 revised complete papers offered have been rigorously chosen in the course of rounds of reviewing and revision; a few have been in particular solicited for inclusion within the booklet after the workshop. so much papers handle membrane platforms and membrane computing from the perspective of theoretical desktop technology; a few papers resolve open difficulties and current new ways, and others supply mathematical and organic heritage. All in all, the e-book provides the cutting-edge in membrane computing.

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Additional info for Membrane Computing: International Workshop, WMC-CdeA 2002 Curtea de Arges, Romania, August 19–23, 2002 Revised Papers

Example text

Of Advances in Cryptology - CRYPTO ’87, Springer-Verlag, 1990, 369–378. 7. Gh. P˘ aun, Computing with membranes - A variant: P systems with polarized membranes, Intern. J. of Foundations of Computer Science, 11, 1 (2000), 167–182. 8. Gh. P˘ aun, Computing with membranes (P systems); Attacking NP-complete problems, Unconventional Models of Computing (I. S. J. ), Springer-Verlag, 2000, 94–115. 9. Gh. P˘ aun, G. Rozenberg, A guide to membrane computing, Theoretical Computer Science, 287, 1 (2002), 73–100.

Uk Abstract. A class of P systems, called EP systems, with string objects processed by evolution rules distributed alongside the transitions of an Eilenberg machine, is introduced. A parallel variant of EP systems, called EPP systems, is also defined and the power of both EP and EPP systems is investigated in relationship with three parameters: number of membranes, states and set of distributed rules. It is shown that EPP systems represent a promising framework for solving NP-complete problems. In particular linear time solutions are provided for the SAT problem.

The following EΠΠ using the above defined V and Γ, but redefining Φ, Q, F and M1 – Φ = {Φ1 , Φ2 , Φ3 , Φ4 , Φ5 }, where • Φ1 = ({A → aAb, A → aA b}), • Φ2 = ({B → Bc, B → B c}), • Φ3 = ({A → ab}), • Φ4 = ({B → B c, B → Bc}), • Φ5 = {B → (c, out)}; – Q = {1, 2, 3, 4}, I = {1}; – F (Φ1 , 1) = {2}, F (Φ2 , 2) = {1}, F (Φ3 , 1) = {3}, F (Φ4 , 3) = {3}, F (Φ5 , 3) = {4}; – M1 = {AB}; leads to L(EΠΠ ) = L(EΠ). The underlying system computes the same language when it is to be considered an EP system as well.

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Membrane Computing: International Workshop, WMC-CdeA 2002 Curtea de Arges, Romania, August 19–23, 2002 Revised Papers by Ioan I. Ardelean (auth.), Gheorghe PĂun, Grzegorz Rozenberg, Arto Salomaa, Claudio Zandron (eds.)


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