Abstract
We describe Top op and Sob op as quasi-varieties by means of suitable “schizophrenic” objects.
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Research of the first author supported by grants from the NSERC of Canada and the FCAR du Québec. Research of the second author supported by the Topology grant 40% and by the NATO grant CRG 941330.
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Barr, M., Pedicchio, M.C. Topological spaces and quasi-varieties. Appl Categor Struct 4, 81–85 (1996). https://doi.org/10.1007/BF00124116
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DOI: https://doi.org/10.1007/BF00124116