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Diskretnyi Analiz i Issledovanie Operatsii, 2013, Volume 20, Issue 2, Pages 88–101
(Mi da728)
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This article is cited in 1 scientific paper (total in 1 paper)
On maximal and minimal elements in partially ordered sets of Boolean degrees
S. S. Marchenkov Lomonosov Moscow State University, Moscow, Russia
Abstract:
The weakest variant of algorithmic reducibility called Boolean reducibility is considered. For various closed classes $Q$, the partially ordered sets $\mathcal L_Q$ of Boolean degrees are analyzed. It is proved that for many closed classes $Q$ the corresponding sets $\mathcal L_Q$ have no maximal elements. Examples of sufficiently large classes $Q$ are given for which the sets $\mathcal L_Q$ contain uncountably many maximal elements. It is established that for closed classes $T_{01}$ and $S$M the corresponding sets of degrees have uncountably many minimal elements. Bibliogr. 8.
Keywords:
Boolean reducibility, closed classes of Boolean functions.
Received: 29.05.2012
Citation:
S. S. Marchenkov, “On maximal and minimal elements in partially ordered sets of Boolean degrees”, Diskretn. Anal. Issled. Oper., 20:2 (2013), 88–101; J. Appl. Industr. Math., 7:4 (2013), 549–556
Linking options:
https://www.mathnet.ru/eng/da728 https://www.mathnet.ru/eng/da/v20/i2/p88
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