Research Output per year

## Personal profile

### Research interests

Willem Haemers is a mathematician, specialised in discrete mathematics, in particular in algebraic graph theory and combinatorial designs.

He is full professor in mathematics (emeritus since December 2013).

### Career

**2014 - today: **Emeritus

**2009 - 2013: **Full professor in discrete Mathematics, Tilburg University** **

**1990 - 2009:** Associate professor in mathematics, Tilburg University

**1986 - 1989:** Assistent professor in mathematics, Tilburg University

**1981-1986:** Researcher, Department of Applied Mathematics, Dr. Neher Laboratories (PTT Research), Leidschendam

**1975-1980:** Research assistent, Department of Mathematics, Technical University Eindhoven

### PhD supervision

M.J.P. Peeters, 1991-1995.

E.R. van Dam, 1992-1996.

A. Abiad, 2011-2015.

## 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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## Research Output 1978 2019

## Cospectral pairs of regular graphs with different connectivity

Haemers, W. H., 11 Apr 2019, Ithaca: Cornell University Library, (arXiv; vol. 1904.05936).Research output: Working paper › Other research output

## Deza graphs with parameters $(n,k,k-1,a)$ and $β=1$

Goryainov, S., Haemers, W. H., Kabanov, V. V. & Shalaginov, L., Mar 2019, In : Journal of Combinatorial Designs. 27, 3, p. 188-202Research output: Contribution to journal › Article › Scientific › peer-review

## Cospectral mates for the union of some classes in the Johnson association scheme

Cioabă, S. M., Haemers, W. H., Johnston, T. & McGinnis, M., 15 Feb 2018, In : Linear Algebra and its Applications. 539, p. 219-228Research output: Contribution to journal › Article › Scientific › peer-review

## Graph switching, 2-ranks, and graphical Hadamard matrices

Abiad, A., Butler, S. & Haemers, W. H., Dec 2018, In : Discrete Mathematics.Research output: Contribution to journal › Article › Scientific › peer-review

## On the spectral characterization of mixed extensions of P3

Haemers, W. H., Sorgun, S. & Topcu, H., 30 Oct 2018, Ithaca: Cornell University Library, 10 p. (arXiv; vol. 1810.12615).Research output: Working paper › Other research output

## Projects 2011 2014

- 2 Finished

## Spectral characterizations of graphs

Abiad Monge, A. & Haemers, W. H.

1/12/11 → 1/12/14

Project: Research project

## Spectral characterizations of graphs

Haemers, W. H. & Camara Vallejo, M.

1/12/11 → 1/12/14

Project: Research project