scientific article; zbMATH DE number 4115211
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Publication:4730230
zbMath0681.41018MaRDI QIDQ4730230
Publication date: 1989
Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Fixed-point and coincidence theorems (topological aspects) (54H25) Best approximation, Chebyshev systems (41A50)
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