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Publication:3854090
zbMath0421.41004MaRDI QIDQ3854090
Publication date: 1979
Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Best approximation, Chebyshev systems (41A50) Harmonic, subharmonic, superharmonic functions in higher dimensions (31B05) Approximation by polynomials (41A10) Approximation by other special function classes (41A30)
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