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In this note it is shown that a topological space in Arhangel’skiĭ’s class MOBI need not be subparacompact nor have a      G δ  {G_\delta }      -diagonal.

Subparacompactness and 𝐺_{𝛿}-diagonals in Arhangel′skiĭ’s class 𝑀𝑂𝐵𝐼