On factorisations onto the Bicyclic semigroup.
M. Demlová (1977/78)
Semigroup forum
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M. Demlová (1977/78)
Semigroup forum
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D. Monk, F. Sioson (1966)
Fundamenta Mathematicae
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B. Zeković (1984)
Matematički Vesnik
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Nenthein, S., Kemprasit, Y. (2006)
International Journal of Mathematics and Mathematical Sciences
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S. Schanuel, J. Isbell (1993)
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A. Geroldinger, F. Halter-Koch (1992)
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U. Knauer, A. Mikhalev (1980)
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John C. Lennox, A. Mohammadi Hassanabadi, James Wiegold (1991)
Rendiconti del Seminario Matematico della Università di Padova
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Yong He, Fang Shao, Shi-qun Li, Wei Gao (2006)
Czechoslovak Mathematical Journal
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In this paper the equivalence on a semigroup in terms of a set of idempotents in is defined. A semigroup is called a -liberal semigroup with as the set of projections and denoted by if every -class in it contains an element in . A class of -liberal semigroups is characterized and some special cases are considered.
G. Song (1993)
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