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https://open.uns.ac.rs/handle/123456789/12681
Title: | On the Partially Ordered Semigroup Generated by the Class Operators I, R, H, S, P | Authors: | Madarász Rozália Tasić B. |
Issue Date: | 1-Jan-2001 | Journal: | Order | Abstract: | Let I, H, S, P be the usual class operators on universal algebras. For a class script K sign of universal algebras of the same type, let R(script K sign) be the class of all algebras isomorphic to a retract of a member of script K sign and let R denote the corresponding class operator. In this paper the semigroup generated by class operators I, R, H, S, P and the corresponding partially ordered set are described. Also the standard semigroups of the above operators are determined for some varieties. | URI: | https://open.uns.ac.rs/handle/123456789/12681 | ISSN: | 01678094 | DOI: | 10.1023/A:1010614400132 |
Appears in Collections: | PMF Publikacije/Publications |
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