Abstract
The problem as to whether the sub-T0 separation and complete regularity are invariant under homeomorphism is answered negatively. And, the problem of multiplicativity of the complete regularity in general L-fuzzy topological spaces is also answered negatively.
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Zhao, B., Wang, S. Solutions to two problems of G. J. Wang. Sci. China Ser. A-Math. 44, 889–894 (2001). https://doi.org/10.1007/BF02880138
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DOI: https://doi.org/10.1007/BF02880138