Geodesic
Some results on $L\Sigma(\kappa)$-spaces
Commentationes Mathematicae Universitatis Carolinae, Tome 49 (2008) no. 4, pp. 667-675.

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We present several results related to $L\Sigma(\kappa)$-spaces where $\kappa$ is a finite cardinal or $\omega$; we consider products and some constructions that lead from spaces of these classes to other spaces of similar classes.
Classification : 54B10, 54C60, 54D20
Keywords: upper semicontinuous mappings; products; Lindelöf $\Sigma$-spaces 
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Casarrubias Segura, F.; Okunev, O.; Ramírez, C. G. Paniagua. Some results on $L\Sigma(\kappa)$-spaces. Commentationes Mathematicae Universitatis Carolinae, Tome 49 (2008) no. 4, pp. 667-675. http://geodesic.mathdoc.fr/item/CMUC_2008__49_4_a11/