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Topic: Conditionally convergent series
Replies: 3   Last Post: Dec 11, 2010 6:58 PM

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Posts: 2
Registered: 11/27/10
Conditionally convergent series
Posted: Nov 27, 2010 9:16 AM
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If u_1+u_2+...=s where series converge conditionally and t>s, then there exists a derangement of the series, which converges to t and which leaves all positive numbers of the series on their places. How to prove it?

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