2016-02-112016-02-11200484-688-6101-4http://hdl.handle.net/11441/34541It is commonly believed that a signi¯cant part of the computational power of membrane systems comes from their inherent non-determinism. Re- cently, R. Freund and Gh. P¸aun have considered deterministic P systems, and formulated the general question whether the computing (generative) capacity of non-deterministic P systems is strictly larger than the (recognizing) capacity of their deterministic counterpart. In this paper, we study the computational power of deterministic P systems in the evolution{communication framework. It is known that, in the genera- tive case, two membranes are enough for universality. For the deterministic systems, we obtain the universality with three membranes, leaving the original problem open.application/pdfengAttribution-NonCommercial-NoDerivatives 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/openAccesshttps://idus.us.es/xmlui/handle/11441/34541