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 Sandwich semigroups of closed functions Commun. Korean Math. Soc. 1997 Vol. 12, No. 1, 135-144 Younki Chae, Wonkyun Jeong Kyungpook National University Abstract : The purpose of this paper is to find all $K_1$-minimal ideals of a sandwich semigroup of closed functions. Keywords : Minimal ideal, semigroup MSC numbers : 54C10 Downloads: Full-text PDF