Weak calibers and the Scott-Watson theorem
If is a space, then the weak extent of is the cardinal If is an open cover of , then there exists such that and . In this note, we show that if is a normal space such that and , then does not have a closed discrete subset of cardinality . We show that this result cannot be strengthened in ZFC to get that the extent of is smaller than , even if the condition that is replaced by the stronger condition that is separable.