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Personal profile


Research on linear algebra, operator theory and systems and control theory.

Several current project are concerned with linear algebra in spaces with an indefinite inner product.


Teaching: Mathematical control and systems theory, linear algebra, and although it is not my expertise, I am teaching an Introduction to Financial Mathematics course.

Ancillary activities

  • Stichting Advancement of Mathematics | Amstelveen | Secretaris/ Penningmeester | 1996-02-01

Ancillary activities are updated daily

Education/Academic qualification

Mathematics, Bachelor, Vrije Universiteit Amsterdam

Mathematics, Master, Vrije Universiteit Amsterdam

Mathematics, PhD, Vrije Universiteit Amsterdam

Fingerprint Fingerprint is based on mining the text of the person's scientific documents to create an index of weighted terms, which defines the key subjects of each individual researcher.

Rank One Perturbation Mathematics
Indefinite Inner Product Mathematics
Matrix Function Mathematics
Rational function Mathematics
Operator Mathematics
Eigenvalue Mathematics
Structured Perturbations Mathematics
Subspace Mathematics

Network Recent external collaboration on country level. Dive into details by clicking on the dots.

Research Output 1999 2018

Remembering Leiba Rodman 1949–2015, at IWOTA 2015

Ball, J. A., Kaashoek, M. A., Ran, A. C. M. & Spitkovsky, I. M. 2018 Operator Theory: Advances and Applications. Springer International Publishing Switzerland, p. 3-12 10 p. (Operator Theory: Advances and Applications; vol. 262)

Research output: Chapter in Book/Report/Conference proceedingChapter



Ran, A. & Mehl, C. 2017 In : Electronic Journal of Linear Algebra. 32, p. 514-530

Research output: Contribution to journalArticle

Open Access
Quaternion Matrix
Jordan Block
Toeplitz Operator
Unit circle
Wiener-Hopf Factorization
Matrix Function
Fourier coefficients

Generic rank-k perturbations of structured matrices.

Ran, A., Batzke, L., Mehl, C. & Rodman, L. 2016 Operator Theory, Function Spaces, and Applications, IWOTA 2014. Birkhäuser, Vol. 255, p. 27-48 (Operator Theory Advances and Applications; vol. 255)

Research output: Chapter in Book/Report/Conference proceedingChapter