Countable Ideals in a Semi-Lattice of the De Enumeration Degrees

In the article we have proved that any countable ideal in the semi-lattice of the De is the intersection of two principal ideals generated by quasi-minimal covers for this ideal.

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Bibliographic Details
Main Author: V. V. Tikhov
Format: Article
Language:English
Published: Yaroslavl State University 2015-02-01
Series:Моделирование и анализ информационных систем
Subjects:
Online Access:https://www.mais-journal.ru/jour/article/view/41
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