In 1960 H. Tamano proved that
for pseudocompact completely regular spaces X and Y , (i) X ×Y is pseudocompact
if and only if prX is z-closed, and (ii) X ×Y is pseudocompact if one of X and Y is a
k-space.
In 1979 C. E. Aull asked if every product of functionally regular SW spaces is an
SW space, and he proved that for a family of functionally regular SW spaces, (iii)
their product is an SW space if and only if it is pseudocompact.
The main results of this paper will answer Aull’s question affirmatively
and prove that (i), (ii), and (iii) hold for strongly functionally Hausdorff
spaces.
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