<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>13</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Mario J. Pérez-Jiménez</style></author><author><style face="normal" font="default" size="100%">Álvaro Romero-Jiménez</style></author><author><style face="normal" font="default" size="100%">Fernando Sancho-Caparrini</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">The P Versus NP Problem Through Cellular Computing with Membranes</style></title><secondary-title><style face="normal" font="default" size="100%">Lecture Notes in Computer Science</style></secondary-title><tertiary-title><style face="normal" font="default" size="100%">Lecture Notes in Computer Science</style></tertiary-title><short-title><style face="normal" font="default" size="100%">Aspects of Molecular Computing</style></short-title></titles><dates><year><style  face="normal" font="default" size="100%">2004</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://dx.doi.org/10.1007/978-3-540-24635-0_26</style></url></web-urls></urls><publisher><style face="normal" font="default" size="100%">Springer</style></publisher><pub-location><style face="normal" font="default" size="100%">Amsterdam, The Netherlands</style></pub-location><volume><style face="normal" font="default" size="100%">2950</style></volume><pages><style face="normal" font="default" size="100%">338-352</style></pages><isbn><style face="normal" font="default" size="100%">978-3-540-20781-8</style></isbn><language><style face="normal" font="default" size="100%">English</style></language><abstract><style face="normal" font="default" size="100%">We study the P versus NP problem through membrane systems. Language accepting P systems are introduced as a framework allowing us to obtain a characterization of the relation by the polynomial time unsolvability of an NP–complete problem by means of a P system.</style></abstract></record></records></xml>