Operator theory is a cornerstone of functional analysis concerned with the study of linear mappings on infinite-dimensional spaces. It encompasses bounded and unbounded operators, spectral theory, ...
THIS work of Prof. Einar Hille is one of the important mathematical books of the century ; it should be read seriously by every mathematician. The subject of semi-groups is one of great and growing ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results