Spaces essentially TDD, TF, TY, TYS and TL.

Rafael Lledó; Josep Guía

Stochastica (1983)

  • Volume: 7, Issue: 3, page 209-216
  • ISSN: 0210-7821


In this paper, by means of the essential derived operator, the classes of topological spaces whose T0 identification spaces are TDD, TF, TY or TL are characterized. This classes are related with the classes of essentially-T1-spaces (R0 spaces), essentially-TD-spaces and essentially-TUD-spaces, already known.In this way, we introduce several axioms more general than the axioms between T1 and T0 defined by Aull and Thron, all of them weaker than R0.

How to cite


Lledó, Rafael, and Guía, Josep. "Espais essencialment TDD, TF, TY, TYS i TL.." Stochastica 7.3 (1983): 209-216. <>.

author = {Lledó, Rafael, Guía, Josep},
journal = {Stochastica},
keywords = {Derivado esencial; Espacios topológicos; Axiomas de separación; -identification spaces},
language = {cat},
number = {3},
pages = {209-216},
title = {Espais essencialment TDD, TF, TY, TYS i TL.},
url = {},
volume = {7},
year = {1983},

AU - Lledó, Rafael
AU - Guía, Josep
TI - Espais essencialment TDD, TF, TY, TYS i TL.
JO - Stochastica
PY - 1983
VL - 7
IS - 3
SP - 209
EP - 216
LA - cat
KW - Derivado esencial; Espacios topológicos; Axiomas de separación; -identification spaces
UR -
ER -

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