Proposition: Subsets of Finite Sets

Let \(X\) be a finite set, and \(S\subseteq X\) its subset. Then \(S\) is also finite and has the cardinality $|S|\le |X|.$

Proofs: 1

Definitions: 1
Motivations: 2
Proofs: 3 4 5 6


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References

Bibliography

  1. Ebbinghaus, H.-D.: "Einführung in die Mengenlehre", BI Wisschenschaftsverlag, 1994, 3th Edition