Author: Ivan Singer Support2 Ebooks by Ivan Singer Ivan Singer: Duality for Nonconvex Approximation and Optimization … PDF English €96.29 Ivan Singer: Best Approximation in Normed Linear Spaces by Elements of Linear Subspaces … PDF English DRM €99.09 0 0 Checkout 0,00 × × × Welcome to our digital bookstore with 3 million ebooks from international publishers in 30 languages!BUY one - get one FREE!Before checkout, you can choose an additional, free ebook!We use cookies for statistical and other functions to give you a super-fast browsing experience. If you continue, you agree. Change user language × ArabicGermanEnglishSpanishFrenchHindiIndonesianItalianMalayDutchPolishPortugueseRomanianRussianSwedishThaiTurkishUkrainianVietnameseChineseInternational Modal ×