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R_{UD}

Last-modified: 2013-04-19 (金) 13:04:59

Definition Edit

  • A topological space (X,τ) is called an R_{UD}-space if for all x in X, cl{x} ∩ ker(x) = {x} ⇒ {x}' is the union of disjoint closed sets.

Property Edit

Reference Edit

  • Misra, D. N.; Dube, K. K., Some axioms weaker than the R0-axiom., (Serbo-Croatian summary), Glasnik Mat. Ser. III 8(28) (1973), 145-148.