18.  Glossary

Continuous mapping between two pre-topological spaces; Continuous mapping between two pre-topological spaces.

Application whose inverse image of a neighborhood of the arrival space is a neighborhood of the departure space.

Espace prétopologique (E,cl): pre-topological space.

Set E with a pre-closure operator $\mathrm{cl}(\cdot )$ .

Opérateur de pré-fermeture $\mathrm{cl}(\cdot )$ : pre-closure operator.

Application defined by