Definition:Limit of Decreasing Sequence of Sets

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Definition

Let $\sequence {S_n}_{n \mathop \in \N}$ be a decreasing sequence of sets.

Let $S = \ds \bigcap_{n \mathop \in \N} S_n$.


Then $S$ is said to be the limit of $\sequence {S_n}_{n \mathop \in \N}$, and one writes $S_n \downarrow S$.


Also see


Sources