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union of sets

GATE CSE & IT · Set Theory & Logic · 1993-1993

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Rosen — Discrete Mathematics and Its Applications

Discrete structures, counting, relations, graph theory

Let $$S$$ be an infinite set and $${S_1},\,\,{S_2},....\,\,{S_n}$$ be sets such that $${S_1} \cup {S_2} \cup ....... \cup {S_n} = S$$. Then