In mathematics, more specifically in functional analysis, a Banach space (pronounced ) is a complete normed vector space.
Banach spaces are named after the Polish mathematician Stefan Banach, who introduced them in 1920–1922 along with Hans Hahn and Eduard Helly.
Read more about Banach Space: Definition, Explanations, Theorems and Properties, Linear Operators, Dual Space, Reflexivity, Tensor Product, Placement in The Hierarchy of Mathematical Structures, Examples, Derivatives, Generalizations
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—Daniel J. Boorstin (b. 1914)