Search All of the Math Forum:
Views expressed in these public forums are not endorsed by
NCTM or The Math Forum.


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?



