Research Output per year

## Personal profile

### Research

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

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, PhD, Vrije Universiteit Amsterdam

Mathematics, Master, Vrije Universiteit Amsterdam

Mathematics, Bachelor, 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.

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Network
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## Research Output 1999 2018

## Equivalence after extension and Schur coupling coincide for inessential operators

ter Horst, S., Messerschmidt, M., Ran, A. C. M., Roelands, M. & Wortel, M., Oct 2018, In : Indagationes Mathematicae. 29, 5, p. 1350-1361 12 p.Research output: Contribution to Journal › Article › Academic › peer-review

## 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 proceeding › Chapter › Academic › peer-review

## LOW RANK PERTURBATIONS OF QUATERNION MATRICES

Ran, A. & Mehl, C., 2017, In : Electronic Journal of Linear Algebra. 32, p. 514-530Research output: Contribution to Journal › Article › Academic › peer-review

## Wiener-Hopf indices of unitary functions on the unit circle in terms of realizations and related results on Toeplitz operators.

Ran, A., Kaashoek, M. A. & Groenewald, G., 2017, In : Indagationes Mathematicae. 28, 3, p. 649-710Research output: Contribution to Journal › Article › Academic › peer-review

## Eigenvalue perturbation theory of structured real matrices and their sign characteristics under generic structured rank-one perturbations.

Ran, A., Mehl, C., Mehrmann, V. & Rodman, L., 2016, In : Linear and Multilinear Algebra. 64, p. 527-556Research output: Contribution to Journal › Article › Academic › peer-review

## Activities 1999 2011

## North-West University, Private Bag X6001, Potchefstroom 2520, Zuid Afrika (External organisation)

Ran, A. C. M. (Member)Activity: Membership › Academic

## Polar Decomposition in Indefinite Inner Product Spaces.

Ran, A. C. M. (Speaker)Activity: Lecture / Presentation › Academic

## SIAM Journal on Matirix Analysis and Applications (External organisation)

Ran, A. C. M. (Member)Activity: Membership › Academic

## Nieuw Archief voor Wiskunde (External organisation)

Ran, A. C. M. (Member)Activity: Membership › Academic

## Stability properties of invariant subspaces of matrices.

Ran, A. C. M. (Speaker)Activity: Lecture / Presentation › Academic