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Statement of a problem № m606

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Let An be a closed set contained in (n, n + 1). Suppose that f: R ->R satisfies ∫Arf = (−1)n/n and f = 0 outside Un An.. Find two partitions of unity Φ and Ψ such that ∑ǿЄΦ∫Rǿ∙f and ∑ǿЄΦ∫Rψ∙f converge absolutely to different values.




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