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Question Number 11145 by FilupS last updated on 14/Mar/17

let set S=R  let nS={R, R, ..., R_(n sets of R) }         n∈Z^+   is ∣S∣<∣nS∣?     what if n=∣S∣?

$$\mathrm{let}\:\mathrm{set}\:{S}=\mathbb{R} \\ $$ $$\mathrm{let}\:{nS}=\left\{\underset{{n}\:\mathrm{sets}\:\mathrm{of}\:\mathbb{R}} {\mathbb{R},\:\mathbb{R},\:...,\:\mathbb{R}}\right\}\:\:\:\:\:\:\:\:\:{n}\in\mathbb{Z}^{+} \\ $$ $$\mathrm{is}\:\mid{S}\mid<\mid{nS}\mid? \\ $$ $$\: \\ $$ $$\mathrm{what}\:\mathrm{if}\:{n}=\mid{S}\mid? \\ $$

Commented byprakash jain last updated on 15/Mar/17

S is noy countable.  ∣nS∣=1 since duplicate elements are removed.  nS is a set of sets.

$$\mathrm{S}\:\mathrm{is}\:\mathrm{noy}\:\mathrm{countable}. \\ $$ $$\mid{nS}\mid=\mathrm{1}\:\mathrm{since}\:\mathrm{duplicate}\:\mathrm{elements}\:\mathrm{are}\:\mathrm{removed}. \\ $$ $${n}\mathrm{S}\:{is}\:{a}\:{set}\:{of}\:{sets}. \\ $$

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