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Öğe On *-operfect sets and ?-*-closed sets(SPRINGER, 2010) Açıkgöz, Ahu; Noiri, Takashi; Yüksel, Sa?ziyeThe main purpose of this paper is to introduce *-operfect, tau*-clopen, alpha-*-closed, strongly alpha-*-closed and pre-*-closed sets. We compare them and obtain a diagram to show their relationships among these sets and related sets.