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Atualizado em 13/05/2026 · De todos da iMusic
![Cover for Ivan Singer · Best Approximation in Normed Linear Spaces by Elements of Linear Subspaces - Grundlehren der mathematischen Wissenschaften (Paperback Book) [Softcover reprint of the original 1st ed. 1970 edition] (2014)](https://imusic.b-cdn.net/images/item/original/856/9783662415856.jpg?ivan-singer-2014-best-approximation-in-normed-linear-spaces-by-elements-of-linear-subspaces-grundlehren-der-mathematischen-wissenschaften-paperback-book&class=scaled&v=1408606583)
![Cover for Ivan Singer · Bases in Banach Spaces I - Grundlehren Der Mathematischen Wissenschaften (Paperback Book) [Softcover Reprint of the Original 1st Ed. 1970 edition] (2012)](https://imusic.b-cdn.net/images/item/original/351/9783642516351.jpg?ivan-singer-2012-bases-in-banach-spaces-i-grundlehren-der-mathematischen-wissenschaften-paperback-book&class=scaled&v=1603373488)
![Cover for Ivan Singer · Bases in Banach Spaces II (Paperback Book) [Softcover Reprint of the Original 1st Ed. 1981 edition] (2011)](https://imusic.b-cdn.net/images/item/original/462/9783642678462.jpg?ivan-singer-2011-bases-in-banach-spaces-ii-paperback-book&class=scaled&v=1408514617)
![Cover for Ivan Singer · Duality for Nonconvex Approximation and Optimization - Cms Books in Mathematics (Paperback Book) [1st Ed. Softcover of Orig. Ed. 2006 edition] (2010)](https://imusic.b-cdn.net/images/item/original/031/9781441921031.jpg?ivan-singer-2010-duality-for-nonconvex-approximation-and-optimization-cms-books-in-mathematics-paperback-book&class=scaled&v=1434986193)
![Cover for Ivan Singer · Duality for Nonconvex Approximation and Optimization - CMS Books in Mathematics (Hardcover Book) [2006 edition] (2006)](https://imusic.b-cdn.net/images/item/original/944/9780387283944.jpg?ivan-singer-2006-duality-for-nonconvex-approximation-and-optimization-cms-books-in-mathematics-hardcover-book&class=scaled&v=1409743754)