Geodesic
Splitting $\omega$-covers
Commentationes Mathematicae Universitatis Carolinae, Tome 38 (1997) no. 2, pp. 375-378.

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

The authors give a ZFC example for a space with $\text{\it Split}\kern 0.8pt (\Omega , \Omega )$ but not $\text{\it Split}\kern 0.8pt (\Lambda , \Lambda )$.
Classification : 03E05, 03E35, 04A20, 54A25, 54D20
Keywords: $\omega$-cover; $\lambda$-cover; $\text{\it Split}\kern 0.8pt(\Omega, \Omega)$; $\text{\it Split}\kern 0.8pt(\Lambda, \Lambda)$; ultrafilter 
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     title = {Splitting $\omega$-covers},
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Just, Winfried; Tanner, Andreas. Splitting $\omega$-covers. Commentationes Mathematicae Universitatis Carolinae, Tome 38 (1997) no. 2, pp. 375-378. http://geodesic.mathdoc.fr/item/CMUC_1997__38_2_a18/