Geodesic
Projectively Solid Sets and an N-dimensional Piccard's Theorem
Serdica Mathematical Journal, Tome 24 (1998) no. 1, pp. 37-48.

Voir la notice de l'article provenant de la source Bulgarian Digital Mathematics Library

We discuss functions f : X × Y → Z such that sets of the form f (A × B) have non-empty interiors provided that A and B are non-empty sets of second category and have the Baire property.
Keywords: Baire-Open Maps, Semigroup, Product 
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Lindgren, W.; Szymanski, A. Projectively Solid Sets and an N-dimensional Piccard's Theorem. Serdica Mathematical Journal, Tome 24 (1998) no. 1, pp. 37-48. http://geodesic.mathdoc.fr/item/SMJ2_1998_24_1_a5/