Geodesic
On the Relative Projection Constants of Certain Classes of Subspaces of $l_\infty^{2n}$
Funkcionalʹnyj analiz i ego priloženiâ, Tome 54 (2020) no. 4, pp. 98-101.

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Relative projection constants of certain classes of cubspaces of codimension 2 in $l_\infty^{2n}$ are found. The minimal projections under considerations are of two kinds, with unit norm and with norm larger than 1.
Keywords: projection operator, space, subspace
Mots-clés : relative projection constant. 
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O. M. Martynov. On the Relative Projection Constants of Certain Classes of Subspaces of $l_\infty^{2n}$. Funkcionalʹnyj analiz i ego priloženiâ, Tome 54 (2020) no. 4, pp. 98-101. http://geodesic.mathdoc.fr/item/FAA_2020_54_4_a7/

[1] J. Blätter, E. W. Cheney, Ann. Mat. Pura ed Appl., 101 (1974), 215–227 | DOI | MR | Zbl

[2] O. M. Martynov, Funkts. analiz i ego pril., 53:3 (2019), 33–44 | DOI | MR | Zbl