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โœฆ   LIBER   โœฆ

A Note on Closed Degrees of Difficulty of the Medvedev Lattice

โœ Scribed by Caterina Bianchini; Andrea Sorbi

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
351 KB
Volume
42
Category
Article
ISSN
0044-3050

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โœฆ Synopsis

We consider some nonprincipal filters of the Medvedev lattice. We prove that the filter generated by the nonzero closed degrees of difficulty is not principal and we compare this filter, with respect to inclusion, with some other filters of the lattice. All the filters considered in this paper are disjoint from the prime ideal generated by the dense degrees of difficulty.

Mathematics Subject Classification: 03D30.

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