Tissue P Systems with Cell Division

In tissue P systems several cells (elementary membranes) commu- nicate through symport/antiport rules, thus carrying out a computation. We add to such systems the basic feature of (cell) P systems with active membranes { the possibility to divide cells. As expected (as it is the case for P systems with active membranes), in this way we get the possibility to solve computa- tionally hard problems in polynomial time; we illustrate this possibility with SAT problem.Ministerio de Ciencia y Tecnología TIC2002-04220-C03-0