Journal of the Faculty of Liberal Arts, Yamaguchi University. Natural science

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Journal of the Faculty of Liberal Arts, Yamaguchi University. Natural science Volume 18
published_at 1984-10

A certain compactness property and free structures

A certain compactness property and free structures
Kashiwagi Takao
Descriptions
In this paper, we give the characterization of a class K of structures which has the property P(K)⊂S(K). Next, we consider free structures which are generated by finite or infinite elements with positive or negative relations.