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Locally finite operator : ウィキペディア英語版 | Locally finite operator
In mathematics, a linear operator is called locally finite if the space is the union of a family of finite-dimensional -invariant subspaces. In other words, there exists a family of linear subspaces of , such that we have the following: * * * Each is finite-dimensional. ==Examples==
* Every linear operator on a finite-dimensional space is trivially locally finite. * Every diagonalizable (i.e. there exists a basis of whose elements are all eigenvectors of ) linear operator is locally finite, because it is the union of subspaces spanned by finitely many eigenvectors of .
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