Maksim

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Yearling

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8	An alternative proof of an application of Hahn-Banach
8	Why does $\int_a^b f(x)h'(x) \, \mathrm{d}x=0$ imply that $f$ is constant?
4	$c_0(N)$ is not dense in $c(N)$ for any norm.
3	How to show that $\sum_{i=1}^\infty\frac{1}{i\cdot2^i}=\ln2$?
3	Prove $ \sup\limits_{t \in A} \|x(t) - y(t)\|$ defines a metric for the space of bounded functions.

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