Definition:Tychonoff Corkscrew/Deleted

Definition
Let $T = \struct {S, \tau}$ denote the Tychonoff corkscrew.

Let $a^-$ denote the distinguished point of $S$ considered as being the infinity point at the bottom of $T$.

The deleted Tychonoff corkscrew is the topological subspace defined as:
 * $T_\infty = \struct {S \setminus \set {a^-}, \tau}$

Also see

 * Deleted Tychonoff Corkscrew is Topology