I don't quite understand the meaning of "(adsbygoogle = window.adsbygoogle || []).push({}); infiniteunion" and "infiniteintersection".

Is an infinite union

∞

U A_{k}

k=1

being defined as a limit

lim (A_{1}U A_{2}U ... U A_{n}) ???

n->∞

How about an infinite intersection?

Thanks!

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# Infinite union & infinite intersection

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