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Proposition: Union of Countably Many Countable Sets

The union of countably many countable sets \(D_n\), \(n\in\mathbb N\), is countable.

Table of Contents

Corollaries: 1 Proofs: 1

Mentioned in:

Proofs: 1 2

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References

Bibliography

  1. Forster Otto: "Analysis 1, Differential- und Integralrechnung einer Veränderlichen", Vieweg Studium, 1983