▼	Set of symbols
▼	Alphabet
▼	Deduction system
▼	Theory
▼	Zermelo-Fraenkel set theory
▼	Set
▼	Binary cartesian set product
▼	Binary relation
▼	Map
▼	Bijective map
▼	Set of bijections
▼	Countable set
▼	Finite set
▼	Class of finite sets

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