= Invariant subspaces
{wiki=Category:Invariant_subspaces}
Invariant subspaces are a concept from functional analysis and operator theory that refers to certain types of subspaces of a vector space that remain unchanged under the action of a linear operator. More specifically: Let \\( V \\) be a vector space and \\( T: V \\to V \\) be a linear operator (which can be a matrix in finite dimensions or more generally a bounded or unbounded linear operator in infinite dimensions).
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