Talk:Pointwise convergence

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I'm not quited convinced that the series {$x^{n}$} is not uniformly convergent on the interval [0,1).The limit function f(x) is not continious at x₀=1. For every 0<x<1 the following is true: lim (n->inf) [sup {|f_n(x)-f(x)|} ]=0

No, that last assertion is false. The value of

$\sup\{\,|f_{n}(x)-f(x)|:0\leq x\leq 1\,\}$

is 1, for every n. That is because, for any fixed value of n, xⁿ can be made as close to 1 as desired by making x close enough, but not equal, to 1. So f_n(x) approximates 1 while the limiting function f(x) remains 0, as x approaches 1. Michael Hardy (talk) 15:39, 5 March 2008 (UTC)

whoa, I am pretty sure that is not true. For any value x < 1, as n goes to infinty, x^n goes to 0. So that function does converge uniformly. —Preceding unsigned comment added by 126.109.110.248 (talk) 12:15, 13 March 2011 (UTC)