A notion of equivalence (c-equivalence) is defined as the counterpart of homeoinorphism for quantized spaces. It is shown that sets with the same number of components and holes are c-equivalent in two-dimensional spaces. Then it is shown that for each arbitrary set there is a set c-equivalent to it with certain "regular" features (rectangular perimeter, holes with diameter one, etc.).
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Mylopoulos et al. (1971) studied this question.
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