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The Communication Hierarchy of Time and SpaceBounded Parallel Machines

Published online by Cambridge University Press:  15 November 2003

Norbert Popély
Norbert Popély*
Affiliation:
Department of Computer Science, P. J. Šafárik University, Jesenná 5, 04154 Košice, Slovakia; [email protected].
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Abstract

We describe the communicating alternating machines and their simulation. We show that, in the case of communicating alternating machines which are bounded, simultaneously, by polynomial time and logarithmic space, the use of three communication levels instead of two does not increase computational power of communicating alternating machines. This resolves an open problem [2] concerning the exact position of machines with three communication levels in the hierarchy.

Keywords

Computational complexitysynchronized alternation.
Type
Research Article
Information
RAIRO - Theoretical Informatics and Applications , Volume 37 , Issue 2 , April 2003 , pp. 159 - 176
Copyright
© EDP Sciences, 2003

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References

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