J
Jorma K. Merikoski
Researcher at University of Tampere
Publications - 74
Citations - 560
Jorma K. Merikoski is an academic researcher from University of Tampere. The author has contributed to research in topics: Matrix (mathematics) & Eigenvalues and eigenvectors. The author has an hindex of 11, co-authored 73 publications receiving 503 citations. Previous affiliations of Jorma K. Merikoski include University UCINF.
Papers
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Inequalities for spreads of matrix sums and products.
TL;DR: In this article, simple inequalities for eigenvalues and singular values of A + B, AB,a ndA ◦ B are presented.H ere denotes the Hadamard product, and the inequalities for additive and multi-plicative spreads of these matrices are shown.
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Characterizations and lower bounds for the spread of a normal matrix
TL;DR: In this article, it was shown that if A is normal, then spr A = max | x * Ax − y * Ay | | x, y ∈ C n,∥ x ∥=∥ y ∥ = 1, x * y =0 = max spr z A + z A * 2 | z∈ C,|z|=1 = 2 max |x * A 2 x −( x * AX ) 2 |+ x * A * Ax + y * Ax | 2 1/2 | x ∈ c n,�
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A best upper bound for the 2-norm condition number of a matrix
TL;DR: In this paper, the best possible upper bound for the ratio of the largest and smallest singular values of A, using tr A∗A, det A, and n only, is obtained.
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Bounds for Eigenvalues Using the Trace and Determinant
Jorma K. Merikoski,Ari Virtanen +1 more
TL;DR: In this article, the bounds for λ kl λ l and λ K + λ + l, involving k, l, n, tr A, and det A only, are presented.
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On the trace and the sum of elements of a matrix
TL;DR: It is demonstrated that in many situations the sum of elements and the trace of a matrix behave similarly.