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Definition: Nested Real Intervals
Let $(I_n)_{n\in\mathbb N}$ be a sequence of closed real intervals. The sequence members $I_n$ are called nested, if $I_{n+1}$ is a proper subset of $I_n$ for all $n\in\mathbb N$, formally $$I_{n+1}\subset I_n,\quad n\in\mathbb N.$$
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References
Bibliography
- Forster Otto: "Analysis 1, Differential- und Integralrechnung einer Veränderlichen", Vieweg Studium, 1983