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Georgii
Posts:
2
Registered:
11/27/10


Conditionally convergent series
Posted:
Nov 27, 2010 9:16 AM


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?



