For any two points , there is an open set such that and or and . A space fulfilling this axiom is called a T0-space.

# T_0-Separation Axiom

## See also

Separation Axioms, T0-Space
*This entry contributed by Margherita
Barile*

## Explore with Wolfram|Alpha

## Cite this as:

Barile, Margherita. "T_0-Separation Axiom." From *MathWorld*--A Wolfram Web Resource, created by Eric
W. Weisstein. https://mathworld.wolfram.com/T0-SeparationAxiom.html