Re: 1-1/2+1/3-1/4+1/5-1/6+1/7

On Tue, 12 Feb 2008 11:17:11 +0100, G. Frege <nomail@invalid> wrote:

For clarity...


For example, we consider the sequence of sets (A_n)
with

A_n := {m e N : m < n} (n e N).
~~~~~~~
Then

lim A_n = N.
n

A_0 = {}
A_1 = {0}
A_2 = {0,1}
A_3 = {0,1,2}
:

N = {0,1,2,...}



F.


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