Journal:
:Revista De La Real Academia De Ciencias Exactas Fisicas Y Naturales Serie A-matematicas2021
Abstract We show that if X is a first-countable Urysohn space where player II has winning strategy in the game $$G^{\omega _1}_1({\mathcal {O}}, {\mathcal {O}}_D)$$ G 1 ω ( O ,</mml:m...
