Powers and generalized cardinal numbers for HCH-objects --- basic notions.
Vagueness and its representations: a unifying look.
Using the notion of a vaguely defined object, we systematize and unify different existing approaches to vagueness and its mathematical representations, including fuzzy sets and derived concepts. Moreover, a new, approximative approach to vaguely defined objects will be introduced and investigated.
A supplement to Gottwald's note on fuzzy cardinals
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