Abstract
It is proved that the image of a normal functor from the Stone-Cech compactification of the projective class of sets also belongs to this class.
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Published in Ukrainskii Matematicheskii Zhurnal, Vol. 47, No. 3, pp. 408–410, March, 1995.
The author would like to express his deep gratitude to Prof. R. Cauty for valuable and stimulating discussions on the subject of the paper.
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Banakh, T. Descriptive classes of sets and topological functors. Ukr Math J 47, 474–476 (1995). https://doi.org/10.1007/BF01056310
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DOI: https://doi.org/10.1007/BF01056310