4. New notions of separation

Classical separations are insufficient from a theoretical point of view, but are also insufficient for certain applications, notably in computer science (p. 465 of ) or in applied geometry; hence the introduction of new separation notions weaker than the T ₂ separation.

4.1 Separation R0 (Shanin)

Definition (Shanin separation (1943)). A topological space

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New notions of separation

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Bibliography

(1) - AARTS (J.M.), NISHIURA (T.) - Dimension and Extensions, - North Holland, 331 pages (1993).
(2) - ADAMS (C.), FRANZOSA (R.) - Introduction to Topology Pure and Applied, - Pearson, 507 pages (2008).
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