Selection principles and upper semicontinuous functions
Tom 117 / 2009
Colloquium Mathematicum 117 (2009), 251-256
MSC: 54A20, 54C30, 54C35, 54D20.
DOI: 10.4064/cm117-2-7
Streszczenie
In connection with a conjecture of Scheepers, Bukovský introduced properties ${\rm wQN}^*$ and ${\rm SSP}^*$ and asked whether ${\rm wQN}^*$ implies ${\rm SSP}^*$. We prove it in this paper. We also give characterizations of properties S$_1(\Gamma, \Omega)$ and S$_{\rm fin}(\Gamma, \Omega)$ in terms of upper semicontinuous functions
