In the present paper we introduce R₀- and R₁-separation axioms in fuzzifying topology and study their relations with T₁- and T₂-separation axioms, respectively. Furthermore, we introduce and study semi-T₀-, semi-R₀-, semi-T₁-, semi-R₁-, semi-T₂ (semi-Hausdorff)-, semi-T₃ (semi-regularity)- and semi-T₄ (semi-normality)-separation axioms in fuzzifying topology and
give some of their characterizations as well as the relations of these axioms and other separation axioms in fuzzifying topology introduced by Shen, Fuzzy Sets and Systems 57 (1993) 111–123.

@ 2001 Elsevier Science B.V.