A note on rank 2 diagonals
classification
🧮 math.GN
keywords
rankdiagonalbellacontinuumdeltaquestionregardingspaces
read the original abstract
We solve two questions regarding spaces with a ($G_\delta$)-diagonal of rank 2. One is a question of Basile, Bella and Ridderbos regarding weakly Lindel\"of spaces with a $G_\delta$-diagonal of rank 2 and the other is a question of Arhangel'skii and Bella asking whether every space with a diagonal of rank 2 and cellularity continuum has cardinality at most continuum.
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