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部分空間
Wikipedia definition
1. Krylov subspaceIn linear algebra, the order-r Krylov subspace generated by an n-by-n matrix A and a vector b of dimension n is the linear subspace spanned by the images of b under the first r powers of A (starting from), that is, It is named after Russian applied mathematician and naval engineer Alexei Krylov, who published a paper on this issue in 1931.
Read “Krylov subspace” on English Wikipedia
Read “クリロフ部分空間” on Japanese Wikipedia
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