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arXiv · 1811.02386

A note on rank 2 diagonals

Angelo Bella·Santi Spadaro
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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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Angelo Bella, Santi Spadaro. 2018-11-06. A note on rank 2 diagonals. https://arxiv.org/abs/1811.02386

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