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Ekström, Sven-Erik [Author] ; Serra-Capizzano, Stefanno [Other]

Eigenvalue isogeometric approximations based on B-splines: tools and results

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Uppsala: Department of Information Technology, Uppsala Universitet, July 2018

Published in: Technical report ; 2018,12
Ekström, Sven-Erik [Author]; Garoni, Carlo [Author]

An interpolation-extrapolation algorithm for computing the eigenvalues of preconditioned banded symmetric Toeplitz matrices

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Uppsala: Department of Information Technology, Uppsala Universitet, [2017]

Published in: Technical report ; 2017,15
Ekström, Sven-Erik [Other]; Furci, Isabella [Other]; Serra-Capizzano, Stefano [Other]

Exact formulae and matrix-less eigensolvers for block banded symmetric Toeplitz matrices

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Uppsala: Department of Information Technology, Uppsala Universitet, March 2018

Published in: Technical report ; 2018,5
Ekström, Sven-Erik [Author]; Serra-Capizzano, Stefano [Author]

Eigenvalues and eigenvectors of banded Toeplitz matrices and the related symbols

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Uppsala: Department of Information Technology, Uppsala Universitet, [2017]

Published in: Technical report ; 2017,10
Ekström, Sven-Erik [Author]; Garoni, Carlo [Author]; Jozefiak, Adam [Author]; Perla, Jesse [Author]

Eigenvalues and eigenvectors of Tau matrices with applications to Markov processes and economics

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Uppsala: Department of Information Technology, Uppsala Universitet, [2020]

Published in: Technical report ; 2020,3
Ekström, Sven-Erik [Author]; Furci, Isabella [Author]; Serra-Capizzano, Stefano [Author]

Are the eigenvalues of the B-spline IgA approximation of -[Delta]u = [Lambda]u known in almost closed form?

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Uppsala: Department of Information Technology, Uppsala Universitet, [2017]

Published in: Technical report ; 2017,16
Barbarino, Giovanni [Author]; Claesson, Melker [Author]; Ekström, Sven-Erik [Author]; Garoni, Carlo [Author]; Meadon, David [Author]

Matrix-less eigensolver for large structured matrices

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Uppsala: Department of Information Technology, Uppsala Universitet, [2021]

Published in: Technical report ; 2021,5
Barbarino, Giovanni [Author]; Claesson, Melker [Author]; Ekström, Sven-Erik [Author]; Garoni, Carlo [Author]; Meadon, David [Author]; Speleers, Hendrik [Author]

Matrix-less eigensolver for large structured matrices

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Uppsala: Department of Information Technology, Uppsala Universitet, [2021]

Published in: Technical report ; 2021,7
Ahmad, Fayyaz [Author]; Al-Aidarous, Eman Salem [Author]; Abdullah Alrehaili, Dina [Author]; Ekström, Sven-Erik [Author]; Furci, Isabella [Author]; Serra-Capizzano, Stefano [Author]

Are the eigenvalues of preconditioned banded symmetric Toeplitz matrices known in almost closed form?

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Uppsala: Department of Information Technology, Uppsala Universitet, [2017]

Published in: Technical report ; 2017,12
Ekström, Sven-Erik; Vassalos, Paris

A matrix-less method to approximate the spectrum and the spectral function of Toeplitz matrices with real eigenvalues

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Springer Science and Business Media LLC, 2022

Published in: Numerical Algorithms, 89 (2022) 2, Seite 701-720
Ekström, Sven-Erik; Garoni, Carlo

A matrix-less and parallel interpolation–extrapolation algorithm for computing the eigenvalues of preconditioned banded symmetric Toeplitz matrices

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Springer Science and Business Media LLC, 2019

Published in: Numerical Algorithms, 80 (2019) 3, Seite 819-848
Barakitis, Nikos; Ekström, Sven‐Erik; Vassalos, Paris

Preconditioners for fractional diffusion equations based on the spectral symbol

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Wiley, 2022

Published in: Numerical Linear Algebra with Applications, 29 (2022) 5
Ekström, Sven‐Erik; Serra‐Capizzano, Stefano

Eigenpairs of some particular band Toeplitz matrices: A comment

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Wiley, 2020

Published in: Numerical Linear Algebra with Applications, 27 (2020) 1
Bogoya, Manuel; Ekström, Sven‐Erik; Serra‐Capizzano, Stefano; Vassalos, Paris

Matrix‐less methods for the spectral approximation of large non‐Hermitian Toeplitz matrices: A concise theoretical analysis and a numerical study

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Wiley, 2024

Published in: Numerical Linear Algebra with Applications, 31 (2024) 4
Bolten, Matthias; Ekström, Sven-Erik; Furci, Isabella; Serra-Capizzano, Stefano

A note on the spectral analysis of matrix sequences via GLT momentary symbols: from all-at-once solution of parabolic problems to distributed fractional order matrices

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Osterreichische Akademie der Wissenschaften, Verlag, 2023

Published in: ETNA - Electronic Transactions on Numerical Analysis, 58 (2023), Seite 136-163
Bogoya, Manuel; Ekström, Sven-Erik; Serra-Capizzano, Stefano

Fast Toeplitz eigenvalue computations, joining interpolation-extrapolation matrix-less algorithms and simple-loop theory

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Springer Science and Business Media LLC, 2022

Published in: Numerical Algorithms, 91 (2022) 4, Seite 1653-1676
Chen, Minghua; Ekström, Sven-Erik; Serra-Capizzano, Stefano

A Multigrid Method for Nonlocal Problems: Non--Diagonally Dominant or Toeplitz-Plus-Tridiagonal Systems

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Society for Industrial & Applied Mathematics (SIAM), 2020

Published in: SIAM Journal on Matrix Analysis and Applications, 41 (2020) 4, Seite 1546-1570
Ekström, Sven-Erik; Garoni, Carlo; Serra-Capizzano, Stefano

Are the Eigenvalues of Banded Symmetric Toeplitz Matrices Known in Almost Closed Form?

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Informa UK Limited, 2018

Published in: Experimental Mathematics, 27 (2018) 4, Seite 478-487
Ekström, Sven-Erik; Furci, Isabella; Serra-Capizzano, Stefano

Exact formulae and matrix-less eigensolvers for block banded symmetric Toeplitz matrices

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Springer Science and Business Media LLC, 2018

Published in: BIT Numerical Mathematics, 58 (2018) 4, Seite 937-968
Garoni, Carlo; Speleers, Hendrik; Ekström, Sven-Erik; Reali, Alessandro; Serra-Capizzano, Stefano; Hughes, Thomas J. R.

Symbol-Based Analysis of Finite Element and Isogeometric B-Spline Discretizations of Eigenvalue Problems: Exposition and Review

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Springer Science and Business Media LLC, 2019

Published in: Archives of Computational Methods in Engineering, 26 (2019) 5, Seite 1639-1690

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