Andrés Felipe

Member for 4 years, 9 months
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If $\|S\|<\sin\frac{\pi}{2n}$ then $\|P(I-S)^ku\|\neq 0$ for all $k=0,\ldots,n$

Feb 23, 2020

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On the dimension of the range of the resolution of the identity

Sep 11, 2020

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A bounded operator $T$ is compact if and only if $\sigma_{\mathrm{ess}}(T)=\{0\}$

Oct 2, 2020

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A bounded operator $T$ is compact if and only if $\sigma_{\mathrm{ess}}(T)=\{0\}$

Oct 2, 2020

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