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Zapiski Nauchnykh Seminarov LOMI, 1987, Volume 163, Pages 154–165
(Mi znsl5466)
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On subsets of Hilbert space having finite Hausdorff dimension
B. I. Shubov
Abstract:
Let $X_1$, $X_2$ be Hilbert spaces, $X_2\subset X_1$, $X_2$ is dense in
$X_1$, the imbedding is compact, $M\subset X_2$, $\dim_H^{(i)}M$
and $h^{(i)}(M)$ are Hausdorff dimension and limit capacity (information
dimension) of the set $M$ with respect to the metric
of the space $X_i(i=1,2)$. Two examples are constructed.
1) An example of the set $M$ which is bounded in $X_2$ and such
that a) $h^{(1)}(M)<\infty$ (and therefore
$\dim_H^{(1)}M<\infty$) b) $M$ cannot be covered by a countable union of compact subsets
of $X_2$ (and therefore $\dim_H^{(2)}M=\infty$)). 2) An example
of the set $M$ which is compact in $X_2$ and such that
$h^{(1)}(M)<\infty$ and $h^{(2)}(M)=\infty$.
Citation:
B. I. Shubov, “On subsets of Hilbert space having finite Hausdorff dimension”, Boundary-value problems of mathematical physics and related problems of function theory. Part 19, Zap. Nauchn. Sem. LOMI, 163, "Nauka", Leningrad. Otdel., Leningrad, 1987, 154–165
Linking options:
https://www.mathnet.ru/eng/znsl5466 https://www.mathnet.ru/eng/znsl/v163/p154
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