Functional analysis is a branch of mathematics concerned with infinite-dimensional vector spaces and mappings between them.

Functional analysis is a branch of mathematics concerned with infinite-dimensional vector spaces (mainly function spaces) and mappings between them. The spaces may be of different, and possibly infinite, dimensions. These mappings are called operators or, if the range is on the real line or in the complex plane, functionals.

functional | functional equation | generalized function | operator

college level