Definition:T1/2 Space

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Definition

Let $T = \struct {S, \tau}$ be a topological space.


Then $T$ is a $T_{\frac 1 2}$ space if and only if:

$\forall A \subseteq S: A'$ is closed

where $A'$ denotes the derivative of $A$.


Also see

  • Results about $T_{\frac 1 2}$ spaces can be found here.


Sources