Geodesic
Chebyshev subspaces of Dirichlet series
Vestnik Moskovskogo universiteta. Matematika, mehanika, no. 6 (2023), pp. 17-23 Cet article a éte moissonné depuis la source Math-Net.Ru

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A. Haar and A. N. Kolmogorov found necessary and sufficient conditions under which finite-dimensional subspaces in the space of continuous functions on an arbitrary compact set are Chebyshev. In this paper, we prove that subspaces of Dirichlet series in the space of $C(0, \infty ]$ of continuous and bounded functions in the interval $(0, \infty )$ that have a limit at infinity form Chebyshev subspaces. 
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V. M. Fedorov. Chebyshev subspaces of Dirichlet series. Vestnik Moskovskogo universiteta. Matematika, mehanika, no. 6 (2023), pp. 17-23. http://geodesic.mathdoc.fr/item/VMUMM_2023_6_a2/

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