This is the website of **Roswitha Rissner**. I am a mathematician and my research interests are algebra and number theory.
In particular, I am interested in polynomials and polynomial functions, integer-valued polynomials, non-unique factorizations, linear algebra over commutative rings and matrix normal forms.

** Contact **

My current position is at Alpen-Adria-Universität Klagenfurt.

Email: roswitha.rissner@aau.at

- A note on analytically irreducible domains, Expository article, 2017.
- Computing {$J$}-ideals of a matrix over a principal ideal domains with
**C. Heuberger**, Linear Algebra Appl., Vol. 527 (2017), 12--31 - Null ideals of matrices over residue class rings of principal ideal domains, Linear Algebra Appl., Vol. 494 (2016), 44--69
- Finiteness and Skolem closure of ideals for non-unibranched domains with
**P.-J. Cahen**, Comm. Algebra, Vol. 43, No. 6 (2015), 2231--2239 - Bounds on the radius and status of graphs with
**R.E. Burkard**, Networks, Vol. 64, No. 2 (2014), 76--83 - Polynomially solvable special cases of the quadratic bottleneck assignment problem with
**R.E. Burkard**, JOCO, Vol. 22 (2011), 845--856

- Algebra VO (MAT.317)
- Algebra UE (MAT.318)
- Matrix Canonical Forms over commutative rings VO (MAT.643)
- Matrix Canonical Forms over commutative rings UE (MAT.644)

Last edited: September 2017