AHU AÇIKGOZ 1 AND TAKASHI NOIRI 2 1. Department of Mathematics, Balikesir University Cagis Campus, Balikesir, 10145 TURKEY
e-mail: ahuacikgoz@gmail.com
2. 2949-1 Shiokita-cho, Hinagu, Yatsushiro-shi, Kumamoto-ken, 869-5142 JAPAN
e-mail: t.noiri@nifty.com
The notions of mn- -closed sets and mn- spaces in an ideal bi m-space are introduced and investigated by Sanabria et al. [18]. In this paper, we introduce the notion of (Λ,mn*)-closed sets and obtain a decomposition of n*-closed sets and a characterization of mn- spaces [18] by using mn- -closed sets and (Λ,mn*)-closed sets.
