Abstract
In this paper we define the notions of rough sub-acts and give some properties of such sub-acts and rough fuzzy sub-acts. We discuss approximations of a subset in acts with respect to Green’s relations. Relationship between upper [lower] rough sub-acts [bi-acts] and upper [lower] aproximations of their homomorphic images are discussed. We also discuss approximations with respect to fuzzy congruences.
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Submitted by M.M. Arslanov
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Shabir, M., Irfan, M. & Khan, A.A. Rough S-acts. Lobachevskii J Math 29, 98–109 (2008). https://doi.org/10.1134/S199508020802008X
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DOI: https://doi.org/10.1134/S199508020802008X