Functional Analysis, in its most fundamental and linear form, is the study of operators on infinite dimensional linear spaces. In his 1920 thesis and then, in a more comprehensive version, in his 1932 treatise, Banach, building on the work of many others, devised a beautiful framework for this endeavour. Soon Banach spaces became an established concept, and Functional Analysis quickly evolved into one of the cornerstones of 20th century mathematics
KeywordsElementary Operator Semiprime Ring Jordan Derivation Central Closure Infinite Dimensional Hilbert Space
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