scientific article; zbMATH DE number 3325773
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zbMath0205.08001MaRDI QIDQ5604622
Publication date: 1970
Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Abstract approximation theory (approximation in normed linear spaces and other abstract spaces) (41A65) Approximation by positive operators (41A36) Special classes of linear operators (47B99)
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