Get Separable Type Representations of Matrices and Fast PDF

By Yuli Eidelman

ISBN-10: 3034806116

ISBN-13: 9783034806114

ISBN-10: 3034806124

ISBN-13: 9783034806121

This two-volume paintings provides a scientific theoretical and computational examine of different types of generalizations of separable matrices. the most recognition is paid to quick algorithms (many of linear complexity) for matrices in semiseparable, quasiseparable, band and significant other shape. The paintings is targeted on algorithms of multiplication, inversion and outline of eigenstructure and contains a huge variety of illustrative examples through the diverse chapters.

The moment quantity, which includes 4 elements, addresses the eigenvalue challenge for matrices with quasiseparable constitution and functions to the polynomial root discovering challenge. within the first half the houses of the attribute polynomials of primary prime submatrices, the constitution of eigenspaces and the fundamental how to compute eigenvalues are studied intimately for matrices with quasiseparable illustration of the 1st order. the second one half is dedicated to the divide and overcome technique, with the most algorithms being derived additionally for matrices with quasiseparable illustration of order one. The QR generation strategy for a few periods of matrices with quasiseparable of any order representations is studied within the 3rd half. this system is then utilized in the final half that allows you to get a quick solver for the polynomial root discovering challenge. The paintings is primarily based on effects bought by means of the authors and their coauthors. because of its many major purposes and the obtainable sort the textual content might be important to engineers, scientists, numerical analysts, computing device scientists and mathematicians alike.

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Additional resources for Separable Type Representations of Matrices and Fast Algorithms: Volume 2 Eigenvalue Method

Sample text

In particular, for ???? = ???? , which is odd, ????(???? ) = 1. 2 one can find again precisely this eigenvector. ,???? − 1, so that the above representation fulfills the conditions of the theorem and therefore the eigenvalue ????0 = ???? is simple and the matrix ???????? −1 (????) is invertible. 2 that ⎛ ⎞ 1 − ????1 ⋅ ⋅ ⋅ ????1 − ????1 0 − ????1 ???? 1 1 ⎟ ⎜ 1 0 − ????1 ⋅ ⋅ ⋅ ????1 ???? ???? ⎟ ⎜ ????1 1 1 1 ⎟ 1 ⎜ − 0 −???? ⋅ ⋅ ⋅ ???? −???? ⎟ ???? ⎜ ????1 1 1 1 ⎟ ⎜ −1 − 0 ⋅ ⋅ ⋅ ????1 ???? ???? ???? ⎟. ???????? −1 (????) = ⎜ ???? ⎜ .. .. . .. ⎟ ⎜ . . . ⎟ ⎜ 1.

Also, ????1 (????) = 8, ????2 (????) = 2 − ????, ????2 (????) = 8(2 − ????) − 10(1 − ????), ????3 (????) = 1, ????2 (????) = 2 − ????. One can check that det ???? = 0, in other words, ????0 = 0 is an eigenvalue of ????. 5) the matrix ???? has exactly one eigenvalue of multiplicity one, since the number of sign changes for the sequence ????3 (−1) = 2 ⋅ 3 ⋅ 4 − 8 ⋅ 3 + 10 ⋅ 2 = 20, ????2 (−1) = 2 ⋅ 3 = 6, ????1 (−1) = 2, ????0 (−1) = 1 is ????(????) = 0, while the number of sign changes ( ) 1 3 1 3 5 − 8 ⋅ + 10 ⋅ ????2 = ⋅ ⋅ 2 2 2 2 2 ( ) ( ) 1 1 1 3 ????2 = ⋅ > 0, ????1 = 2 2 2 2 for the sequence 1 15 − 96 + 40 = < 0, 2 8 ( ) 1 1 , ????0 =1 2 2 is ????(????) = 1.

Consider the simple eigenvalue ????1 = ???? − ????1 . 41) ???? = ????1 + ????2 + . . + ???????? and by ???? = − ????????1 , then ⎛ ????1 ????1 ????1 .. ⎜ ⎜ ⎜ ⎜ ⎜ ⎜ ⎜ ⎝ ????1 ????1 ????1 ????1 ????2 .. ????2 ????2 ????2 ????2 ????1 .. ????3 ????3 ⋅⋅⋅ ⋅⋅⋅ ⋅⋅⋅ .. ⋅⋅⋅ ⋅⋅⋅ ???????? −1 ???????? −1 ???????? −1 .. ????1 ???????? ???????? ???????? ???????? .. ???????? ????1 ⎞⎛ ???? 1 1 .. ⎟⎜ ⎟⎜ ⎟⎜ ⎟⎜ ⎟⎜ ⎟⎜ ⎟⎜ ⎠⎝ 1 1 ⎞ ⎛ 0 0 0 .. ⎟ ⎜ ⎟ ⎜ ⎟ ⎜ ⎟ ⎜ ⎟=⎜ ⎟ ⎜ ⎟ ⎜ ⎠ ⎝ 0 0 ⎞ ⎟ ⎟ ⎟ ⎟ ⎟. 2, one finds that the matrix ???????? (???? − ????1 ) is not invertible. 40) with ???? = ????1 and ????1 − ???????? −1 as its ???? th and last factor, one obtains that det ???????? (???? − ????1 ) = 0.

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Separable Type Representations of Matrices and Fast Algorithms: Volume 2 Eigenvalue Method by Yuli Eidelman


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