@article {479, title = {Searching previous configurations in membrane computing}, journal = {10th Workshop on Membrane Computing}, year = {2009}, month = {24-27/08/2009}, pages = {282-297}, publisher = {Marpapublicidad}, address = {Curtea de Arges, Rumania}, abstract = {Searching all the con figurations C{\textquoteright} which produce a given con figuration C is an extremely hard task. The current approximations are based on heavy hand-made calculus by considering the speci c features of the given con guration. In this paper we present a general method for characterizing all the con figurations C{\textquoteright} which produce a given con guration C in the framework of transition P systems without cooperation and without dissolution.}, url = {http://www.gcn.us.es/?q=procwmc10}, author = {Miguel A. Guti{\'e}rrez-Naranjo and Mario J. P{\'e}rez-Jim{\'e}nez} }