### Radicals of semigroup rings of orthogroups.

A.G. Sokolsky (1990)

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A.G. Sokolsky (1990)

Semigroup forum

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I.S. Ponizovskiî (1984)

Semigroup forum

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M. Rajagopalan, E. Granirer (1964)

Mathematica Scandinavica

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S. Lajos (1965)

Matematički Vesnik

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P. A. Meyer (1982)

Recherche Coopérative sur Programme n°25

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T. Niedbalska (1978)

Colloquium Mathematicae

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Peter M. Higgins (1988)

Colloquium Mathematicae

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A. Varisco, A. Cherubini (1981)

Semigroup forum

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Richard Wiegandt (1972)

Czechoslovak Mathematical Journal

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Kelarev, A.V. (1991)

Acta Mathematica Universitatis Comenianae. New Series

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Mridul K. Sen, Sumanta Chattopadhyay (2008)

Discussiones Mathematicae - General Algebra and Applications

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Let S = {a,b,c,...} and Γ = {α,β,γ,...} be two nonempty sets. S is called a Γ -semigroup if aαb ∈ S, for all α ∈ Γ and a,b ∈ S and (aαb)βc = aα(bβc), for all a,b,c ∈ S and for all α,β ∈ Γ. In this paper we study the semidirect product of a semigroup and a Γ-semigroup. We also introduce the notion of wreath product of a semigroup and a Γ-semigroup and investigate some interesting properties of this product.

S. Shkodra (1989)

Matematički Vesnik

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