Abstract
Let \(A = ({a_{ij}})_i,j=1^M\) be an M x M real matrix. (We shall deal with real square matrices for notational convenience.) For x ∈ℝM, set
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© 1985 Springer-Verlag Berlin Heidelberg
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Pinkus, A. (1985). Matrices and n-Widths. In: n-Widths in Approximation Theory. Ergebnisse der Mathematik und ihrer Grenzgebiete, vol 7. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-69894-1_6
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DOI: https://doi.org/10.1007/978-3-642-69894-1_6
Publisher Name: Springer, Berlin, Heidelberg
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