Amha Tume Lisan

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Let S be topological semigroup, we consider an appropriate semigroup compacti cation b S of S. In this paper we study the connection between subgroups of a maximal group in a minimal left ideal of b S, which arise as equivalence classes of some closed left congruence, and the minimal ow characterized by the left congruence. A particular topology is de ned(More)
The authors of [1] in exhibiting their 6-cell example say that "The different cells ... have lengthy and complicated definitions. Accordingly and with reluctance, we are incorporating the definitions ... here, as a lawyer would say, "by reference"." Indeed, in order to keep this paper to be a short note, we follow suit and reluctantly refer the reader to(More)
The classical theory of dynamical systems arose in the context of the study of di erential equations. In recent years the study of these systems has been extended beyond discrete or continuous (real) phase groups or semigroups to the theory of ows of more general topological groups or semigroups. Let S be a semitopological semigroup, not necessarily(More)
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