(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Prove that the union of c sets of cardinality c has cardinality c.

2. Relevant equations

3. The attempt at a solution

Well, I could look for a one-to-one and onto function... maybe mapping the union of c intervaks to the reals, or something? I know how to demonstrate that a countable union of countable sets is countable, by showing how to label them.

I'm having a hard time with this one, though.

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# Homework Help: Cardinality of Infinite Sets

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