Realistic Error Bounds for a Simple Eigenvalue and Its Jordan Normal Form of a Complex Matrix. Acm Transactions on Mathematical Software, Ing and Ordering Eigenvalues of a Real Upper Hessenberg Matrix. Acm Transactions On
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چکیده
This paper describes two methods for computing the invariant subspace of a matrix. The rst method involves using transformations to interchange the eigenvalues. The matrix is assumed to be in Schur form and transformations are applied to interchange neighboring blocks. The blocks can be either one by one or two by two. The second method involves the construction of an invariant subspace by a direct computation of the vectors, rather than by applying transformations to move the desired eigenvalues to the top of the matrix.
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