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Staff photo Bo Kågström

Bo Kågström

Research qualifications: Docent

Contact

E-mail
bo.kagstrom@umu.se
Phone
+46 90 786 54 19, +46 73 620 54 19

Works at

Affiliation
Affiliated as professor emeritus at Department of Computing Science
Location
MIT-huset, Umeå universitet, MIT.D.448 Umeå universitet, 901 87 Umeå
Affiliation
Affiliated as professor at High Performance Computing Centre North (HPC2N)
Location
MIT huset, Campustorget 5, 4 tr, MIT.D.453 Umeå universitet, 901 87 Umeå
Geometry of Matrix Polynomial Spaces
Foundations of Computational Mathematics, Springer 2020, Vol. 20, (3) : 423-450
Dmytryshyn, Andrii; Johansson, Stefan; Kågström, Bo; et al.
D7.8 Release of the NLAFET library
NLAFET Consortium; Umeå University 2019
Kågström, Bo; Myllykoski, Mirko; Karlsson, Lars; et al.
D2.7 Eigenvalue solvers for nonsymmetric problems
NLAFET Consortium; Umeå University 2019
Myllykoski, Mirko; Kjelgaard Mikkelsen, Carl Christian; Schwarz, Angelika Beatrix; et al.
Distributed one-stage Hessenberg-triangular reduction with wavefront scheduling
SIAM Journal on Scientific Computing, Society for Industrial and Applied Mathematics 2018, Vol. 40, (2) : C157-C180
Adlerborn, Björn; Karlsson, Lars; Kågström, Bo
On the Tunability of a New Hessenberg Reduction Algorithm Using Parallel Cache Assignment
Parallel Processing and Applied Mathematics. PPAM 2017: Part 1, Springer 2018 : 579-589
Eljammaly, Mahmoud; Karlsson, Lars; Kågström, Bo
An auto-tuning framework for a NUMA-aware Hessenberg reduction algorithm
ICPE '18 Companion of the 2018 ACM/SPEC International Conference on Performance Engineering, ACM Digital Library 2018 : 5-8
Eljammaly, Mahmoud; Karlsson, Lars; Kågström, Bo
D2.6 Prototype Software for Eigenvalue Problem Solvers
NLAFET Consortium; Umeå University 2018
Myllykoski, Mirko; Karlsson, Lars; Kågström, Bo; et al.
Towards Highly Parallel and Compute-Bound Computation of Eigenvectors of Matrices in Schur Form
Report / UMINF, 17.10
Adlerborn, Björn; Kjelgaard Mikkelsen, Carl Christian; Karlsson, Lars; et al.
Canonical structure transitions of system pencils
SIAM Journal on Matrix Analysis and Applications, Society for Industrial and Applied Mathematics 2017, Vol. 38, (4) : 1249-1267
Dmytryshyn, Andrii; Johansson, Stefan; Kågström, Bo
An auto-tuning framework for a NUMA-aware Hessenberg reduction algorithm
Report / UMINF, 17.19
Eljammaly, Mahmoud; Karlsson, Lars; Kågström, Bo
D2.5 Eigenvalue problem solvers
NLAFET 2017
Kjelgaard Mikkelsen, Carl Christian; Myllykoski, Mirko; Adlerborn, Björn; et al.
Task-Based Parallel Algorithms for Eigenvalue Reordering of Matrices in Real Schur Forms
Report / UMINF, 17.11
Myllykoski, Mirko; Kjelgaard Mikkelsen, Carl Christian; Karlsson, Lars; et al.
Distributed one-stage Hessenberg-triangular reduction with wavefront scheduling
Report / UMINF, 16.10
Adlerborn, Björn; Kågström, Bo; Karlsson, Lars
Evaluation of the Tunability of a New NUMA-Aware Hessenberg Reduction Algorithm
Report / UMINF, 16.21
Eljammaly, Mahmoud; Karlsson, Lars; Kågström, Bo
PDHGEQZ user guide
Report / UMINF, 15.12
Adlerborn, Björn; Kågström, Bo; Kressner, Daniel
Change of the congruence canonical form of 2-by-2 and 3-by-3 matrices under perturbations and bundles of matrices under congruence
Linear Algebra and its Applications, Vol. 469 : 305-334
Dmytryshyn, Andrii; Futorny, Vyacheslav; Kågström, Bo; et al.
Canonical structure transitions of system pencils
Report / UMINF, 15.15
Dmytryshyn, Andrii; Johansson, Stefan; Kågström, Bo
Geometry of spaces for matrix polynomial Fiedler linearizations
Report / UMINF, 15.17
Dmytryshyn, Andrii; Johansson, Stefan; Kågström, Bo; et al.
Coupled Sylvester-type Matrix Equations and Block Diagonalization
SIAM Journal on Matrix Analysis and Applications, Vol. 36, (2) : 580-593
Dmytryshyn, Andrii; Kågstrom, Bo
Algorithm 953: Parallel Library Software for the Multishift QR Algorithm with Aggressive Early Deflation
ACM Transactions on Mathematical Software, Vol. 41, (4)
Granat, Robert; Kagstrom, Bo; Kressner, Daniel; et al.
A parallel QZ algorithm for distributed memory HPC systems
SIAM Journal on Scientific Computing, SIAM publications 2014, Vol. 36, (5) : C480-C503
Adlerborn, Björn; Kågström, Bo; Kressner, Daniel
Orbit closure hierarchies of skew-symmetric matrix pencils
SIAM Journal on Matrix Analysis and Applications, Vol. 35, (4) : 1429-1443
Dmytryshyn, Andrii; Kågstrom, Bo
Orbit closure hierarchies of skew-symmetric matrix pencils
UMINF, 14.02
Dmytryshyn, Andrii; Kågström, Bo
Symmetric matrix pencils: codimension counts and the solution of a pair of matrix equations
The Electronic Journal of Linear Algebra, Vol. 27 : 1-18
Dmytryshyn, Andrii; Kågström, Bo; Sergeichuk, Vladimir V.
Improving Perfect Parallelism
Parallel Processing and Applied Mathematics: 10th International Conference, PPAM 2013, Warsaw, Poland, September 8-11, 2013, Revised Selected Papers, Part I, Springer Berlin/Heidelberg 2014 : 76-85
Karlsson, Lars; Kjelgaard Mikkelsen, Carl Christian; Kågström, Bo
Fine-Grained Bulge-Chasing Kernels for Strongly Scalable Parallel QR Algorithms
Parallel Computing, Elsevier 2014, (7) : 271-288
Karlsson, Lars; Kågström, Bo; Wadbro, Eddie
Codimension computations of congruence orbits of matrices, symmetric and skew-symmetric matrix pencils using Matlab
Report / UMINF, 13.18
Dmytryshyn, Andrii; Johansson, Stefan; Kågström, Bo
Skew-symmetric matrix pencils: codimension counts and the solution of a pair of matrix equations
Linear Algebra and its Applications, Elsevier 2013, Vol. 438, (8) : 3375-3396
Dmytryshyn, Andrii; Kågström, Bo; Sergeichuk, Vladimir V.
Stratification of full rank polynomial matrices
Linear Algebra and its Applications, Elsevier 2013, Vol. 439, (4) : 1062-1090
Johansson, Stefan; Kågström, Bo; Van Dooren, Paul
Approximate incomplete cyclic reduction for systems which are tridiagonal and strictly diagonally dominant by rows
Applied Parallel and Scientific Computing: 11th International Conference, PARA 2012, Helsinki, Finland, June 10-13, 2012, Revised Selected Papers, Springer Berlin/Heidelberg 2013 : 250-264
Kjelgaard Mikkelsen, Carl Christian; Kågström, Bo
Parallel and Cache-Efficient In-Place Matrix Storage Format Conversion
ACM Transactions on Mathematical Software, New York: Association for Computing Machinery 2012, Vol. 38, (3) : 17:1-17:32
Gustavson, Fred; Karlsson, Lars; Kågström, Bo
Efficient Reduction from Block Hessenberg Form to Hessenberg Form Using Shared Memory
Applied parallel and scientific computing: Part II : 258-268
Karlsson, Lars; Kagstrom, Bo
Incomplete cyclic reduction of banded and strictly diagonally dominant linear systems
PARALLEL PROCESSING AND APPLIED MATHEMATICS, PT I, Springer 2012 : 80-91
Kjelgaard Mikkelsen, Carl Christian; Kågström, Bo
Parallel solution of narrow banded diagonally dominant linear systems
Applied Parallel and Scientific Computing, Pt II, Springer Berlin/Heidelberg 2012 : 280-290
Kjelgaard Mikkelsen, Carl Christian; Kågström, Bo
StratiGraph Tool: Matrix Stratifications in Control Applications
Control and Optimization with Differential-Algebraic Constraints, Philadelphia: Society for Industrial and Applied Mathematics 2012 : 79-103
Kågström, Bo; Johansson, Stefan; Johansson, Pedher
On aggressive early deflation in parallel variants of the QR algorithm
Applied parallel and scientific computing, PT I, Berlin, Heidelberg: Springer 2012 : 1-10
Kågström, Bo; Kressner, Daniel; Shao, Meiyue
Parallel two-stage reduction to Hessenberg form using dynamic scheduling on shared-memory architectures
Parallel Computing, Vol. 37, (12) : 771-782
Karlsson, Lars; Kågström, Bo
StratiGraph Tool: Matrix Stratifications in Control Applications
Report / UMINF, 11.12
Kågström, Bo; Johansson, Stefan; Johansson, Pedher
Computing codimensions and generic canonical forms for generalized matrix products
The Electronic Journal of Linear Algebra, Vol. 22 : 277-309
Kågström, Bo; Karlsson, Lars; Kressner, Daniel
On aggressive early deflation in parallel variants of the QR algorithm
Lecture notes in computer science
Kågström, Bo; Kressner, Daniel; Shao, Meiyue
SCASY users' guide: release 1.0
Report / UMINF, 09.10
Granat, Robert; Kågström, Bo
Algorithm 904: the SCASY library - parallel solvers for Sylvester-type matrix equations with applications in condition estimation, part II
ACM Transactions on Mathematical Software, New York: Association for Computing Machinery (ACM) 2010, Vol. 37, (3)
Granat, Robert; Kågström, Bo
Parallel Solvers for Sylvester-type Matrix Equations with Applications in Condition Estimation, Part I: Theory and Algorithms
ACM Transactions on Mathematical Software, New York: ACM Press 2010, Vol. 37, (3) : 32:1-32:32
Granat, Robert; Kågström, Bo
A novel parallel QR algorithm for hybrid distributed memory HPC systems
SIAM Journal on Scientific Computing, Society for industrial and applied mathematics (SIAM) 2010, Vol. 32, (4) : 2345-2378
Granat, Robert; Kågström, Bo; Kressner, Daniel
A numerical evaluation of solvers for the periodic riccati differential equation
BIT Numerical Mathematics, Springer 2010, Vol. 50, (2) : 301-329
Gusev, Sergei; Johansson, Stefan; Kågström, Bo; et al.
Efficient reduction from block Hessenberg form to Hessenberg form using shared memory
PARA 2010: State of the Art in Scientific and Parallel Computing, Reykjavik, June 6-9, 2010
Karlsson, Lars; Kågström, Bo
Parallel Scientific Computing and Optimization: Advances with Applications
Springer Optimization and Its Applications, Vol. 27
Ciegis, Raimondas; Henty, David; Kågström, Bo; et al.
Stratification of controllability and observability pairs: theory and use in applications
SIAM Journal on Matrix Analysis and Applications, Philadelphia: Society for Industrial and Applied Mathematics 2009, Vol. 31, (2) : 203-226
Elmroth, Erik; Johansson, Stefan; Kågström, Bo
RECSY and SCASY library software: recursive blocked and parallel algorithms for Sylvester-type matrix equations with some applications
Parallel scientific computing and optimization: advances and applications, Springer-Verlag New York 2009 : 3-24
Granat, Robert; Jonsson, Isak; Kågström, Bo
Parallel Eigenvalue Reordering in Real Schur Forms
Concurrency and Computation, Vol. 21, (9) : 1225-1250
Granat, Robert; Kågström, Bo; Kressner, Daniel
View publications in DiVA

Research groups

Research leader
Matrix Computations with Applications
Research leader
Parallel and High-Performance Computing
Research leader
Parallel and Scientific Computing

Research projects

1 January 1998
StratiGraph and MCS Toolbox
Published: 27 Oct, 2020