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13:05
Does anyone know what Ian means by diagonalization in his comment on this question: math.stackexchange.com/questions/2039788/…
?
 
2 hours later…
15:32
in Mathematics, 1 hour ago, by user193319
Is $f_n : [0,1] \to \Bbb{R}$ defined by $f_n = n 1_{[0,1]}$ a cauchy sequence with respect to the $L^1$ norm? If my calculations are right, it seems to reduce to determining whether $\epsilon > 0$, there is $N \in \Bbb{N}$ s.t. if $s \in \Bbb{N}$ and $n \ge N$, then $\frac{2s}{n+s} < \epsilon$...But I'm having trouble showing that this is true...
@user193319 Isn't there some typo in the message I copied above? AFAICT you get $\|f_m-f_n\|=|m-n|$.
 
2 hours later…
17:50
How does one show that $C[0,1]$, the step of all continuous real-valued functions on $[0,1]$, is dense in $L^p[0,1]$? Any hints or MSE link would be appreciated.
I have asked in the searching chatroom. On the off-chance that somebody has a bit of spare time and is willing to spend some time searching.

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