University of Waterloo Cauchy Sequence Metric Spaces Real Analysis

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Ryfn_111

Mathematics

University of Waterloo

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Running head: REAL ANALYSIS

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Real Analysis

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REAL ANALYSIS
Real Analysis
Problem 1. For i ∈ β„•, let 𝑒𝑖 = (0,…, 0,1,0,…) be the vector with 1 at the i-th place and zeros
elsewhere. Let (πœ†π‘– )βˆžπ‘–=1 be a sequence of real numbers and let f : 𝑐00 β†’ κ“£ be the linear map
uniquely determined by f(𝑒𝑖 ) = πœ†π‘– for all i ∈ β„•..
1). Prove that f is continuous with respect to β€–.β€–βˆž (on 𝑐00 ) if and only if the sum of βˆ‘βˆž
𝑖=1 πœ†π‘– is
absolutely convergent.

∞
First let suppose that f is continuous and let βˆ‘βˆž
𝑖...


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