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13th International Conference on Membrane Computing - MTA Sztaki

13th International Conference on Membrane Computing - MTA Sztaki

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L.F. Macías-Ramos, M.J. Pérez-Jiménez, A. Riscos-Núñez, M. Rius-F<strong>on</strong>t,<br />

L. Valencia-Cabrera<br />

i in ∈ {1, . . . , q} is the input cell.<br />

i out = 0 is the output regi<strong>on</strong>, that is, the output of the system is encoded in<br />

the envir<strong>on</strong>ment.<br />

All computati<strong>on</strong>s halt.<br />

If C is a computati<strong>on</strong> of Π, then either object yes or object no (but not<br />

both) must have been released into the output regi<strong>on</strong>, and <strong>on</strong>ly at the last<br />

step of the computati<strong>on</strong>.<br />

For each w ∈ Σ ∗ , the computati<strong>on</strong> of the system Π with input w ∈ Σ ∗ starts<br />

from the c<strong>on</strong>gurati<strong>on</strong> of the form (M 1 , . . . , M iin + w, . . . , M q ; ∅), that is, the<br />

input multiset w has been added to the c<strong>on</strong>tents of the input cell i in , and we<br />

denote it by Π + w. Therefore, we have an initial c<strong>on</strong>gurati<strong>on</strong> associated with<br />

each input multiset w (over the input alphabet Σ) in this kind of systems.<br />

Given such a recognizer tissue P system and a halting computati<strong>on</strong> C =<br />

{C t } t

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