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ORCIDWillem H. Haemers
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Journal Articles
- 2024
[j55]Willem H. Haemers
, Hatice Topcu:
The signed graphs with two eigenvalues unequal to ±1. Appl. Math. Comput. 463: 128348 (2024)- 2022
- [j54]Willem H. Haemers, Leila Parsaei Majd:
Spectral symmetry in conference matrices. Des. Codes Cryptogr. 90(9): 1983-1990 (2022) - 2021
- [j53]Sebastian M. Cioaba, Krystal Guo, Willem H. Haemers:
The chromatic index of strongly regular graphs. Ars Math. Contemp. 20(1): 187-194 (2021) - [j52]Saieed Akbari, Willem H. Haemers, Mohammad Ali Hosseinzadeh, Vladislav V. Kabanov, Elena V. Konstantinova, Leonid Shalaginov:
Spectra of strongly Deza graphs. Discret. Math. 344(12): 112622 (2021) - 2020
- [j51]Ebrahim Ghorbani, Willem H. Haemers, Hamid Reza Maimani, Leila Parsaei Majd:
On sign-symmetric signed graphs. Ars Math. Contemp. 19(1): 83-93 (2020) - [j50]Omid Etesami, Willem H. Haemers:
On NP-hard graph properties characterized by the spectrum. Discret. Appl. Math. 285: 526-529 (2020) - [j49]Willem H. Haemers:
Cospectral pairs of regular graphs with different connectivity. Discuss. Math. Graph Theory 40(2): 577-584 (2020) - 2019
- [j48]Willem H. Haemers, Sezer Sorgun, Hatice Topcu:
On the Spectral Characterization of Mixed Extensions of P3. Electron. J. Comb. 26(3): 3 (2019) - [j47]Hatice Topcu, Sezer Sorgun, Willem H. Haemers:
The graphs cospectral with the pineapple graph. Discret. Appl. Math. 269: 52-59 (2019) - [j46]Willem H. Haemers:
Spectral characterization of mixed extensions of small graphs. Discret. Math. 342(10): 2760-2764 (2019) - [j45]Aida Abiad, Steve Butler, Willem H. Haemers:
Graph switching, 2-ranks, and graphical Hadamard matrices. Discret. Math. 342(10): 2850-2855 (2019) - 2017
- [j44]Aart Blokhuis, Edwin R. van Dam, Willem H. Haemers, Jack H. Koolen:
Preface to the special issue dedicated to Andries E. Brouwer. Des. Codes Cryptogr. 84(1-2): 1-2 (2017) - [j43]Sebastian M. Cioaba, Willem H. Haemers, Jason R. Vermette:
The graphs with all but two eigenvalues equal to -2 or 0. Des. Codes Cryptogr. 84(1-2): 153-163 (2017) - 2016
- [j42]Aida Abiad, Willem H. Haemers:
Switched symplectic graphs and their 2-ranks. Des. Codes Cryptogr. 81(1): 35-41 (2016) - 2015
- [j41]Zoltán Blázsik, Jay Cummings, Willem H. Haemers:
Cospectral regular graphs with and without a perfect matching. Discret. Math. 338(3): 199-201 (2015) - 2014
- [j40]Marc Cámara, Willem H. Haemers:
Spectral characterizations of almost complete graphs. Discret. Appl. Math. 176: 19-23 (2014) - [j39]Dean Crnkovic, Willem H. Haemers:
Walk-regular divisible design graphs. Des. Codes Cryptogr. 72(1): 165-175 (2014) - [j38]Edwin R. van Dam, Willem H. Haemers, Jack H. Koolen:
Regular graphs with maximal energy per vertex. J. Comb. Theory B 107: 123-131 (2014) - 2012
- [j37]Aida Abiad, Willem H. Haemers:
Cospectral Graphs and Regular Orthogonal Matrices of Level 2. Electron. J. Comb. 19(3): 13 (2012) - [j36]Edwin R. van Dam, Willem H. Haemers:
Preface: Geometric and algebraic combinatorics. Des. Codes Cryptogr. 65(1-2): 1-3 (2012) - [j35]Aart Blokhuis, Andries E. Brouwer, Willem H. Haemers:
The graph with spectrum 141 240 (-4)10 (-6)9. Des. Codes Cryptogr. 65(1-2): 71-75 (2012) - [j34]Willem H. Haemers, M. J. P. Peeters:
The maximum order of adjacency matrices of graphs with a given rank. Des. Codes Cryptogr. 65(3): 223-232 (2012) - 2011
- [j33]Edwin R. van Dam, Willem H. Haemers:
An odd characterization of the generalized odd graphs. J. Comb. Theory B 101(6): 486-489 (2011) - [j32]Willem H. Haemers, Hadi Kharaghani, Maaike A. Meulenberg:
Divisible design graphs. J. Comb. Theory A 118(3): 978-992 (2011) - 2010
- [j31]Edwin R. van Dam, Willem H. Haemers:
Preface: Geometric and Algebraic Combinatorics. Eur. J. Comb. 31(6): 1497-1498 (2010) - [j30]Willem H. Haemers, Qing Xiang:
Strongly regular graphs with parameters (4m4, 2m4+m2, m4+m2, m4+m2) exist for all m>1. Eur. J. Comb. 31(6): 1553-1559 (2010) - 2009
- [j29]Edwin R. van Dam, Willem H. Haemers:
Developments on spectral characterizations of graphs. Discret. Math. 309(3): 576-586 (2009) - [j28]Sebastian M. Cioaba, David A. Gregory, Willem H. Haemers:
Matchings in regular graphs from eigenvalues. J. Comb. Theory B 99(2): 287-297 (2009) - 2007
- [j27]Aart Blokhuis, Andries E. Brouwer, Willem H. Haemers:
On 3-chromatic distance-regular graphs. Des. Codes Cryptogr. 44(1-3): 293-305 (2007) - [j26]Edwin R. van Dam, Willem H. Haemers:
Geometric and algebraic combinatorics. Eur. J. Comb. 28(7): 1877 (2007) - 2006
- [j25]Andries E. Brouwer, Peter J. Cameron, Willem H. Haemers, Donald A. Preece:
Self-dual, not self-polar. Discret. Math. 306(23): 3051-3053 (2006) - [j24]Nick C. Fiala, Willem H. Haemers:
5-chromatic strongly regular graphs. Discret. Math. 306(23): 3083-3096 (2006) - [j23]Edwin R. van Dam, Willem H. Haemers, Jacobus H. Koolen, Edward Spence:
Characterizing distance-regularity of graphs by the spectrum. J. Comb. Theory A 113(8): 1805-1820 (2006) - 2005
- [j22]Aart Blokhuis, Willem H. Haemers:
Preface. Des. Codes Cryptogr. 34(2-3): 135-135 (2005) - 2004
- [j21]Eiichi Bannai, Willem H. Haemers, Patrick Solé:
Johan Jacob Seidel 1919-2001. Eur. J. Comb. 25(2): 145-146 (2004) - [j20]Willem H. Haemers, Edward Spence:
Enumeration of cospectral graphs. Eur. J. Comb. 25(2): 199-211 (2004) - 2001
- [j19]Willem H. Haemers, Edward Spence:
The Pseudo-geometric Graphs for Generalized Quadrangles of Order (3, t). Eur. J. Comb. 22(6): 839-845 (2001) - [j18]Willem H. Haemers:
Bicliques and Eigenvalues. J. Comb. Theory B 82(1): 56-66 (2001) - 2000
- [j17]Aart Blokhuis, Willem H. Haemers:
Preface. Des. Codes Cryptogr. 21(1/3): 5 (2000) - [j16]Frans C. Bussemaker, Willem H. Haemers, Edward Spence:
The Search for Pseudo Orthogonal Latin Squares of Order Six. Des. Codes Cryptogr. 21(1/3): 77-82 (2000) - 1999
- [j15]Willem H. Haemers, René Peeters, Jeroen M. van Rijckevorsel:
Binary Codes of Strongly Regular Graphs. Des. Codes Cryptogr. 17(1-3): 187-209 (1999) - [j14]Willem H. Haemers:
Minimum resolvable coverings with small parallel classes. Discret. Math. 197-198: 393-396 (1999) - 1998
- [j13]Edwin R. van Dam, Willem H. Haemers:
Graphs with constant µ and µ_. Discret. Math. 182(1-3): 293-307 (1998) - 1997
- [j12]Willem H. Haemers:
Disconnected Vertex Sets and Equidistant Code Pairs. Electron. J. Comb. 4(1) (1997) - 1996
- [j11]Willem H. Haemers, Vladimir D. Tonchev:
Spreads in Strongly Regular Graphs. Des. Codes Cryptogr. 8(1-2): 145-157 (1996) - 1995
- [j10]Matthijs J. Coster, Willem H. Haemers:
Quasi-Symmetric Designs Related to the Triangular Graph. Des. Codes Cryptogr. 5(1): 27-42 (1995) - 1993
- [j9]Andries E. Brouwer, Willem H. Haemers:
The Gewirtz Graph: An Exercise in the Theory of Graph Spectra. Eur. J. Comb. 14(5): 397-407 (1993) - [j8]Willem H. Haemers, Christopher Parker, Vera Pless, Vladimir D. Tonchev:
A Design and a Code Invariant under the Simple Group Co3. J. Comb. Theory A 62(2): 225-233 (1993) - 1992
- [j7]Andries E. Brouwer, Willem H. Haemers:
Structure and uniqueness of the (81, 20, 1, 6) strongly regular graph. Discret. Math. 106-107: 77-82 (1992) - [j6]Andries E. Brouwer, Henny A. Wilbrink, Willem H. Haemers:
Some 2-ranks. Discret. Math. 106-107: 83-92 (1992) - 1991
- [j5]Willem H. Haemers:
Regular 2-Graphs and Extensions of Partial Geometries. Eur. J. Comb. 12(2): 115-123 (1991) - [j4]Willem H. Haemers:
Divisible designs with r-lambda1 = 1. J. Comb. Theory A 57(2): 316-319 (1991) - 1989
- [j3]Frans C. Bussemaker, Willem H. Haemers, R. Matron, Henny A. Wilbrink:
A (49, 16, 3, 6) Strongly Regular Graph Does Not Exist. Eur. J. Comb. 10(5): 413-418 (1989) - [j2]Frans C. Bussemaker, Willem H. Haemers, J. J. Seidel, Edward Spence:
On (v, k, lambda) graphs and designs with trivial automorphism group. J. Comb. Theory A 50(1): 33-46 (1989) - 1979
- [j1]Willem H. Haemers:
On Some Problems of Lovász Concerning the Shannon Capacity of a Graph. IEEE Trans. Inf. Theory 25(2): 231-232 (1979)
Conference and Workshop Papers
- 1985
- [c2]Willem H. Haemers:
Access Control at the Netherlands Postal and Telecommunications Services. CRYPTO 1985: 543-544 - 1984
- [c1]B. Sanders, Willem H. Haemers, R. Wilcke:
A Contribution to the Techniques of Traffic Engineering in Communications Networks With Waiting Facilities. ICC (1) 1984: 56-60
Parts in Books or Collections
- 2011
- [p1]Willem H. Haemers:
Matrices for graphs, designs and codes. Information Security, Coding Theory and Related Combinatorics 2011: 253-277
Coauthor Index
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