%0 Journal Article %A Dahmen, Wolfgang %A Görlich, Ernst %T The characterization problem for best approximation with exponential error orders and evaluation of entropy %J Mathematische Nachrichten %V 76 %@ 0025-584x %C Weinheim %I Wiley-VCH %M RWTH-CONV-062019 %P 163-179 %D 1977 %F PUB:(DE-HGF)16 %9 Journal Article %U <Go to ISI:>//WOS:A1977DP37400011 %R 10.1002/mana.19770760112 %U https://publications.rwth-aachen.de/record/185554