Startseite On complexity of realisation of a class of almost symmetric functions by formulas of depth 3
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On complexity of realisation of a class of almost symmetric functions by formulas of depth 3

  • S. E. Cherukhina
Veröffentlicht/Copyright: 27. Mai 2008
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Discrete Mathematics and Applications
Aus der Zeitschrift Band 18 Heft 2

Abstract

We consider the class of almost symmetric Boolean functions. For any function of this class, the values on all tiers except the second one coincide with the values of a monotone symmetric function with threshold 3. The values on the second tier are arbitrary. We study realisation of functions of this class by & ∨ &- formulas over the basis {&, ∨}.

We obtain a sharp bound for the minimum complexity of the functions of this class (the function of minimum complexity is explicitly written out) and an asymptotic estimate of complexity of a monotone symmetric function with threshold 3 which is maximal in order of complexity in the class under consideration.

Received: 2005-12-19
Published Online: 2008-05-27
Published in Print: 2008-May

© de Gruyter 2008

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