Geodesic
Asymptotics of the $n$-Widths of a Wiener Spiral in Complex Hilbert Space
Matematičeskie zametki, Tome 89 (2011) no. 5, pp. 686-693.

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We describe isometric embeddings of the Wiener spiral in complex Hilbert space and obtain the asymptotics of the Kolmogorov $n$-widths of specific embeddings. We note the difference with the asymptotics of the $n$-widths of the Wiener spiral in real Hilbert space.
Keywords: Wiener spiral, Kolmogorov $n$-width, complex Hilbert space, real Hilbert space, isometric embedding, correlation function of a mapping, Hermitian kernel. 
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R. S. Ismagilov; K. V. Uskov. Asymptotics of the $n$-Widths of a Wiener Spiral in Complex Hilbert Space. Matematičeskie zametki, Tome 89 (2011) no. 5, pp. 686-693. http://geodesic.mathdoc.fr/item/MZM_2011_89_5_a4/

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