Willem H. Haemers

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All published works

Action	Title	Year	Authors
+ PDF Chat	Divisible design graphs from the symplectic graph	2024	Bart De Bruyn Sergey Goryainov Willem H. Haemers Leonid Shalaginov
+ PDF Chat	Divisible design graphs from the symplectic graph	2024	Bart De Bruyn Sergey Goryainov Willem H. Haemers Leonid Shalaginov
+	The signed graphs with two eigenvalues unequal to ±1	2023	Willem H. Haemers Hatice Topçu
+	Cospectral mates for generalized Johnson and Grassmann graphs	2023	Aida Abiad Jozefien D’haeseleer Willem H. Haemers Robin Simoens
+	On signed graphs with at most two eigenvalues unequal to ±1	2023	Willem H. Haemers Hatice Topçu
+	The signed graphs with two eigenvalues unequal to $\pm 1$	2023	Willem H. Haemers Hatice Topçu
+	Cospectral mates for generalized Johnson and Grassmann graphs	2023	Aida Abiad Jozefien D’haeseleer Willem H. Haemers Robin Simoens
+	Cospectrality results for signed graphs with two eigenvalues unequal to $\pm 1$	2023	Willem H. Haemers Hatice Topçu
+ PDF Chat	Graph toughness from Laplacian eigenvalues	2022	Xiaofeng Gu Willem H. Haemers
+ PDF Chat	Spectra of strongly Deza graphs	2021	Saieed Akbari Willem H. Haemers Mohammad Ali Hosseinzadeh V. V. Kabanov Elena V. Konstantinova Leonid Shalaginov
+	On signed graphs with at most two eigenvalues unequal to $\pm 1$.	2021	Willem H. Haemers Hatice Topçu
+ PDF Chat	Spectral symmetry in conference matrices	2021	Willem H. Haemers Leila Parsaei Majd
+ PDF Chat	The chromatic index of strongly regular graphs	2021	Sebastian M. Cioabă Krystal Guo Willem H. Haemers
+	Hoffman's ratio bound	2021	Willem H. Haemers
+	Hoffman's ratio bound	2021	Willem H. Haemers
+	Spectra of strongly Deza graphs	2021	Saieed Akbari Willem H. Haemers Mohammad Ali Hosseinzadeh V. V. Kabanov Elena V. Konstantinova Leonid Shalaginov
+	Spectra of strongly Deza graphs	2021	Saieed Akbari Willem H. Haemers Mohammad Ali Hosseinzadeh V. V. Kabanov Elena V. Konstantinova Leonid Shalaginov
+	Graph toughness from Laplacian eigenvalues	2021	Xiaofeng Gu Willem H. Haemers
+	On signed graphs with at most two eigenvalues unequal to $\pm 1$	2021	Willem H. Haemers Hatice Topçu
+	Spectra of strongly Deza graphs	2021	Saieed Akbari Willem H. Haemers Mohammad Ali Hosseinzadeh V. V. Kabanov Elena V. Konstantinova Leonid Shalaginov
+	Hoffman's ratio bound	2021	Willem H. Haemers
+	Universal spectra of the disjoint union of regular graphs	2020	Willem H. Haemers Mohammad Reza Oboudi
+ PDF Chat	On sign-symmetric signed graphs	2020	Ebrahim Ghorbani Willem H. Haemers Hamid Reza Maimani Leila Parsaei Majd
+	On NP-hard graph properties characterized by the spectrum	2020	Omid Etesami Willem H. Haemers
+	Spectral symmetry in conference matrices	2020	Willem H. Haemers Leila Parsaei Majd
+	Universal spectra of the disjoint union of regular graphs	2020	Willem H. Haemers Mohammad Reza Oboudi
+	On sign-symmetric signed graphs	2020	Ebrahim Ghorbani Willem H. Haemers Hamid Reza Maimani Leila Parsaei Majd
+	Spectral symmetry in conference matrices	2020	Willem H. Haemers Leila Parsaei Majd
+	Universal spectra of the disjoint union of regular graphs	2020	Willem H. Haemers Mohammad Reza Oboudi
+	On sign-symmetric signed graphs	2020	Ebrahim Ghorbani Willem H. Haemers Hamid Reza Maimani Leila Parsaei Majd
+	Cospectral pairs of regular graphs with different connectivity	2019	Willem H. Haemers
+	On NP-hard graph properties characterized by the spectrum	2019	Omid Etesami Willem H. Haemers
+ PDF Chat	On the Spectral Characterization of Mixed Extensions of $P_{3}$	2019	Willem H. Haemers Sezer Sorgun Hatice Topçu
+	Cospectral pairs of regular graphs with different connectivity	2019	Willem H. Haemers
+	On NP-hard graph properties characterized by the spectrum	2019	Omid Etesami Willem H. Haemers
+	Cospectral pairs of regular graphs with different connectivity	2019	Willem H. Haemers
+	Graph switching, 2-ranks, and graphical Hadamard matrices	2018	Aida Abiad Steve Butler Willem H. Haemers
+ PDF Chat	Deza graphs with parameters (n,k,k−1,a) and β=1	2018	Sergey Goryainov Willem H. Haemers V. V. Kabanov Leonid Shalaginov
+	On the spectral characterization of mixed extensions of $P_3$	2018	Willem H. Haemers Sezer Sorgun Hatice Topçu
+	The graphs cospectral with the pineapple graph	2018	Hatice Topçu Sezer Sorgun Willem H. Haemers
+	The chromatic index of strongly regular graphs	2018	Sebastian M. Cioabă Krystal Guo Willem H. Haemers
+	Deza graphs with parameters $(n,k,k-1,a)$ and $\beta=1$	2018	Sergey Goryainov Willem H. Haemers V. V. Kabanov Leonid Shalaginov
+	Signed graphs cospectral with the path	2018	Saieed Akbari Willem H. Haemers Hamid Reza Maimani Leila Parsaei Majd
+	Spectral characterization of mixed extensions of small graphs	2018	Willem H. Haemers
+	Graph switching, 2-ranks, and graphical Hadamard matrices	2018	Aida Abiad Steve Butler Willem H. Haemers
+	On the spectral characterization of mixed extensions of $P_3$	2018	Willem H. Haemers Sezer Sorgun Hatice Topçu
+	The chromatic index of strongly regular graphs	2018	Sebastian M. Cioabă Krystal Guo Willem H. Haemers
+	Spectral characterization of mixed extensions of small graphs	2017	Willem H. Haemers
+ PDF Chat	Cospectral mates for the union of some classes in the Johnson association scheme	2017	Sebastian M. Cioabă Willem H. Haemers Travis Johnston Matt McGinnis
+	Signed graphs cospectral with the path	2017	Saieed Akbari Willem H. Haemers Hamid Reza Maimani Leila Parsaei Majd
+	Cospectral mates for the union of some classes in the Johnson association scheme	2017	Sebastian M. Cioabă Willem H. Haemers Travis Johnston Matt McGinnis
+	Spectral characterization of mixed extensions of small graphs	2017	Willem H. Haemers
+	Cospectral mates for the union of some classes in the Johnson association scheme	2017	Sebastian M. Cioabă Willem H. Haemers Travis Johnston Matt McGinnis
+	Signed graphs cospectral with the path	2017	Saieed Akbari Willem H. Haemers Hamid Reza Maimani Leila Parsaei Majd
+ PDF Chat	The graphs with all but two eigenvalues equal to $$-2$$ - 2 or 0	2016	Sebastian M. Cioabă Willem H. Haemers Jason R. Vermette
+	On the spectral characterization of pineapple graphs	2016	Hatice Topçu Sezer Sorgun Willem H. Haemers
+	The graphs with all but two eigenvalues equal to $-2$ or $0$	2016	Sebastian M. Cioabă Willem H. Haemers Jason R. Vermette
+	Are almost all graphs determined by their spectrum	2016	Willem H. Haemers
+	The graphs with all but two eigenvalues equal to $-2$ or $0$	2016	Sebastian M. Cioabă Willem H. Haemers Jason R. Vermette
+	On the spectral characterization of pineapple graphs	2015	Hatice Topçu Sezer Sorgun Willem H. Haemers
+	On the spectral characterization of pinapple graphs	2015	Hatice Topçu Sezer Sorgun Willem H. Haemers
+ PDF Chat	Notes on simplicial rook graphs	2015	Andries E. Brouwer Sebastian M. Cioabă Willem H. Haemers Jason R. Vermette
+ PDF Chat	Switched symplectic graphs and their 2-ranks	2015	Aida Abiad Willem H. Haemers
+ PDF Chat	Godsil-McKay switching and isomorphism	2015	Aida Abiad Andries E. Brouwer Willem H. Haemers
+	On the spectral characterization of pineapple graphs	2015	Hatice Topçu Sezer Sorgun Willem H. Haemers
+ PDF Chat	Cospectral regular graphs with and without a perfect matching	2014	Zoltán L. Blázsik Jay Cummings Willem H. Haemers
+ PDF Chat	The graphs with all but two eigenvalues equal to $$\pm 1$$ ± 1	2014	Sebastian M. Cioabă Willem H. Haemers Jason R. Vermette Wiseley Wong
+	Cospectral regular graphs with and without a perfect matching	2014	Zoltán L. Blázsik Jay Cummings Willem H. Haemers
+	Notes on simplicial rook graphs	2014	Andries E. Brouwer Sebastian M. Cioabă Willem H. Haemers Jason R. Vermette
+	Regular graphs with maximal energy per vertex	2014	Edwin van Dam Willem H. Haemers Jack H. Koolen
+	An interlacing approach for bounding the sum of Laplacian eigenvalues of graphs	2014	Aida Abiad M.A. Fiol Willem H. Haemers Guillem Perarnau
+	Regular graphs with maximal energy per vertex	2014	Edwin van Dam Willem H. Haemers Jack H. Koolen
+	Godsil-McKay switching and isomorphism	2014	Aida Abiad Andries E. Brouwer Willem H. Haemers
+	Switched symplectic graphs and their 2-ranks	2014	Aida Abiad Willem H. Haemers
+	Notes on simplicial rook graphs	2014	Andries E. Brouwer Sebastian M. Cioabă Willem H. Haemers Jason R. Vermette
+	Cospectral regular graphs with and without a perfect matching	2014	Zoltán L. Blázsik Jay Cummings Willem H. Haemers
+	Matrices and Graphs	2013	Willem H. Haemers
+ PDF Chat	Spectral characterizations of almost complete graphs	2013	Marc Cámara Willem H. Haemers
+	Walk-regular divisible design graphs	2013	Dean Crnković Willem H. Haemers
+ PDF Chat	An Interlacing Approach for Bounding the Sum of Laplacian Eigenvalues of Graphs	2013	Aida Abiad M. A. Fiol Willem H. Haemers Guillem Perarnau
+ PDF Chat	An interlacing approach for bounding the sum of Laplacian eigenvalues of graphs	2013	Aida Abiad M. A. Fiol Willem H. Haemers Guillem Perarnau
+	An Interlacing Approach for Bounding the Sum of Laplacian Eigenvalues of Graphs	2013	Aida Abiad M. A. Fiol Willem H. Haemers Guillem Perarnau
+	The graphs with all but two eigenvalues equal to $\pm 1$	2013	Sebastian M. Cioabă Willem H. Haemers Jason Vermette Wiseley Wong
+	Spectral characterizations of almost complete graphs	2012	Marc Cámara Willem H. Haemers
+ PDF Chat	Cospectral Graphs and Regular Orthogonal Matrices of Level 2	2012	Aida Abiad Willem H. Haemers
+	Skew-adjacency matrices of graphs	2012	Michael Cavers Sebastian M. Cioabă Shaun Fallat David A. Gregory Willem H. Haemers Steve Kirkland Judith J. McDonald Michael J. Tsatsomeros
+ PDF Chat	Seidel Switching and Graph Energy	2012	Willem H. Haemers
+ PDF Chat	The maximum order of reduced square (0,1)-matrices with a given rank	2012	Willem H. Haemers M.J.P. Peeters
+	Seidel Switching and Graph Energy	2012	Willem H. Haemers
+	Seidel Switching and Graph Energy	2012	Willem H. Haemers
+	Cospectral Graphs and Regular Orthogonal Matrices of Level 2	2012	Aida Abiad Willem H. Haemers
+	Spectral characterizations of almost complete graphs	2012	Marc Cámara Willem H. Haemers
+	Spectra of Graphs	2011	Andries E. Brouwer Willem H. Haemers
+	Groups and Graphs	2011	Andries E. Brouwer Willem H. Haemers
+	Graphs with Few Eigenvalues	2011	Andries E. Brouwer Willem H. Haemers
+	Strongly Regular Graphs	2011	Andries E. Brouwer Willem H. Haemers
+	Distance-Regular Graphs	2011	Andries E. Brouwer Willem H. Haemers
+	The Second-Largest Eigenvalue	2011	Andries E. Brouwer Willem H. Haemers
+	Trees	2011	Andries E. Brouwer Willem H. Haemers
+	Topology	2011	Andries E. Brouwer Willem H. Haemers
+	Graph Spectrum	2011	Andries E. Brouwer Willem H. Haemers
+ PDF Chat	An odd characterization of the generalized odd graphs	2011	Edwin van Dam Willem H. Haemers
+ PDF Chat	The maximum order of adjacency matrices of graphs with a given rank	2011	Willem H. Haemers M.J.P. Peeters
+	Regularity: spectral characterizations	2011	Willem H. Haemers
+ PDF Chat	The graph with spectrum 141 240 (−4)10 (−6)9	2011	Aart Blokhuis Andries E. Brouwer Willem H. Haemers
+	Universal adjacency matrices with two eigenvalues	2011	Willem H. Haemers G.R. Omidi
+	Matrices for graphs designs and codes	2011	Willem H. Haemers
+ PDF Chat	The Maximum Order of Reduced Square (0, 1)- Matrices with a Given Rank	2011	Willem H. Haemers René Peeters
+	The Maximum Order of Reduced Square(0, 1)-Matrices with a Given Rank	2011	Willem H. Haemers M.J.P. Peeters
+	Divisible design graphs	2010	Willem H. Haemers Hadi Kharaghani Maaike A. Meulenberg
+ PDF Chat	An Odd Characterization of the Generalized Odd Graphs	2010	Edwin van Dam Willem H. Haemers
+	The Maximum Order of Adjacency Matrices with a Given Rank	2010	René Peeters Willem H. Haemers
+	Universal Adjacency Matrices with Two Eigenvalues	2010	Willem H. Haemers G.R. Omidi
+	An Odd Characterization of the Generalized Odd Graphs	2010	Edwin van Dam Willem H. Haemers
+ PDF Chat	Graphs cospectral with Kneser graphs	2010	Willem H. Haemers Farzaneh Ramezani
+	Universal Adjacency Matrices with Two Eigenvalues	2010	Willem H. Haemers G.R. Omidi
+	Strongly regular graphs with parameters (4m^4, 2m^4 + m^2, m^4 + m^2, m^4 + m^2) exist for all m>1	2010	Willem H. Haemers Qing Xiang
+	Strongly regular graphs with parameters <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" display="inline" overflow="scroll"><mml:mrow><mml:mo>(</mml:mo><mml:mn>4</mml:mn><mml:msup><mml:mrow><mml:mi>m</mml:mi></mml:mrow><mml:mrow><mml:mn>4</mml:mn></mml:mrow></mml:msup><mml:mo>,</mml:mo><mml:mn>2</mml:mn><mml:msup><mml:mrow><mml:mi>m</mml:mi></mml:mrow><mml:mrow><mml:mn>4</mml:mn></mml:mrow></mml:msup><mml:mo>+</mml:mo><mml:msup><mml:mrow><mml:mi>m</mml:mi></mml:mrow><…	2009	Willem H. Haemers Qing Xiang
+	Regularity and the spectra of graphs	2009	Willem H. Haemers
+	On the sum of Laplacian eigenvalues of graphs	2009	Willem H. Haemers A. Mohammadian B. Tayfeh‐Rezaie
+ PDF Chat	Graphs Cospectral with Kneser Graphs	2009	Willem H. Haemers Farzaneh Ramezani
+	Graphs Cospectral with Kneser Graphs	2009	Willem H. Haemers Farzaneh Ramezani
+	Developments on Spectral Characterizations of Graphs	2009	Edwin van Dam Willem H. Haemers
+	Graphs Cospectral with Kneser Graphs	2009	Willem H. Haemers Farzaneh Ramezani
+	Developments on spectral characterizations of graphs	2008	Edwin van Dam Willem H. Haemers
+	Matchings in regular graphs from eigenvalues	2008	Sebastian M. Cioabă David A. Gregory Willem H. Haemers
+	A lower bound for the Laplacian eigenvalues of a graph—Proof of a conjecture by Guo	2008	Andries E. Brouwer Willem H. Haemers
+ PDF Chat	Strongly regular graphs with maximal energy	2008	Willem H. Haemers
+	The integral trees with spectral radius 3	2008	A.E. Brouwer Willem H. Haemers
+	Spectral characterizations of lollipop graphs	2008	Willem H. Haemers Xiaogang Liu Yuanping Zhang
+ PDF Chat	Hamiltonian Strongly Regular Graphs	2008	Andries E. Brouwer Willem H. Haemers
+	Algebraic Graph Theory (a short course for postgraduate students and researchers)	2008	A.E. Brouwer Willem H. Haemers
+	On the Sum of Laplacian Eigenvalues of Graphs	2008	Willem H. Haemers A. Mohammadian B. Tayfeh‐Rezaie
+	A Lower Bound for the Laplacian Eigenvalues of a Graph-Proof of a Conjecture by Guo	2008	A.E. Brouwer Willem H. Haemers
+	Hamiltonian Strongly Regular Graphs	2008	A.E. Brouwer Willem H. Haemers
+	A Lower Bound for the Laplacian Eigenvalues of a Graph-Proof of a Conjecture by Guo	2008	Andries E. Brouwer Willem H. Haemers
+	On the Sum of Laplacian Eigenvalues of Graphs	2008	Willem H. Haemers A. Mohammadian B. Tayfeh‐Rezaie
+	Hamiltonian Strongly Regular Graphs	2008	A.E. Brouwer Willem H. Haemers
+ PDF Chat	On 3-chromatic distance-regular graphs	2007	Aart Blokhuis Andries E. Brouwer Willem H. Haemers
+ PDF Chat	Strongly Regular Graphs with Maximal Energy	2007	Willem H. Haemers
+	The Integral Trees With Spectral Radius 3	2007	Andries E. Brouwer Willem H. Haemers
+	Developments on spectral characterizations of graphs	2007	Edwin van Dam Willem H. Haemers
+	Strongly Regular Graphs with Maximal Energy	2007	Willem H. Haemers
+	The Integral Trees with Spectral Radius 3	2007	A.E. Brouwer Willem H. Haemers
+ PDF Chat	Developments on Spectral Characterizations of Graphs	2007	Edwin van Dam Willem H. Haemers
+	Matrices and Graphs	2006	Willem H. Haemers
+	Matrices and Graphs	2006	Willem H. Haemers
+	Geometric and algebraic combinatorics	2006	Edwin van Dam Willem H. Haemers
+	Cospectral graphs and the generalized adjacency matrix	2006	Edwin van Dam Willem H. Haemers Jack H. Koolen
+ PDF Chat	5-chromatic strongly regular graphs	2006	Nick C. Fiala Willem H. Haemers
+	Characterizing distance-regularity of graphs by the spectrum	2006	Edwin van Dam Willem H. Haemers Jack H. Koolen Edward Spence
+ PDF Chat	Regularity and the generalized adjacency spectra of graphs	2006	Andrey Chesnokov Willem H. Haemers
+ PDF Chat	Cospectral Graphs and the Generalized Adjacency Matrix	2006	Edwin van Dam Willem H. Haemers Jack H. Koolen
+ PDF Chat	On 3-Chromatic Distance-Regular Graphs	2006	Aart Blokhuis Andries E. Brouwer Willem H. Haemers
+	Cospectral graphs and the generalized adjacency matrix	2006	Edwin van Dam Willem H. Haemers Jack H. Koolen
+ PDF Chat	Conditions for Singular Incidence Matrices	2005	Willem H. Haemers
+	Matrices and Graphs	2005	Willem H. Haemers
+ PDF Chat	Regularity and the Generalized Adjacency Spectra of Graphs	2005	Andrey Chesnokov Willem H. Haemers
+	Matrices and Graphs	2005	Willem H. Haemers
+	Characterizing Distance-Regularity of Graphs by the Spectrum	2005	Edwin van Dam Willem H. Haemers Jack H. Koolen Edward Spence
+	Characterizing Distance-Regularity of Graphs by the Spectrum	2005	Edwin van Dam Willem H. Haemers Jack H. Koolen Edward Spence
+	Regularity and the Generalized Adjacency Spectra of Graphs	2005	A. A. Chesnokov Willem H. Haemers
+	Matrices and Graphs	2005	Willem H. Haemers
+	Matrices and Graphs	2005	Willem H. Haemers
+	Eigenvalues and perfect matchings	2004	Andries E. Brouwer Willem H. Haemers
+	Eigenvalues and Perfect Matchings	2004	Andries E. Brouwer Willem H. Haemers
+	Eigenvalues and Perfect Matchings	2004	A.E. Brouwer Willem H. Haemers
+ PDF Chat	Enumeration of cospectral graphs	2003	Willem H. Haemers Edward Spence
+ PDF Chat	Which graphs are determined by their spectrum?	2003	Edwin van Dam Willem H. Haemers
+ PDF Chat	The Hermitian two-graph and its code	2002	Willem H. Haemers Elisabeth Kuijken
+	The complement of the path is determined by its spectrum	2002	Michael Doob Willem H. Haemers
+ PDF Chat	None	2002	Edwin van Dam Willem H. Haemers
+	Which graphs are determined by their spectrum	2002	Edwin van Dam Willem H. Haemers
+	Enumeration of Cospectral Graphs	2002	Willem H. Haemers Edward Spence
+	Enumeration of Cospectral Graphs	2002	Willem H. Haemers Edward Spence
+	The Pseudo-geometric Graphs for Generalized Quadrangles of Order (3, t)	2001	Willem H. Haemers Edward Spence
+	Bicliques and Eigenvalues	2001	Willem H. Haemers
+	None	2000	F.C. Bussemaker Willem H. Haemers Edward Spence
+	Spectral Characterizations of Some Distance-Regular Graphs	2000	Edwin van Dam Willem H. Haemers
+	The Pseudo-Geometric Graphs for Generalised Quadrangles of Order (3,t)	2000	Willem H. Haemers Edward Spence
+	The Pseudo-Geometric Graphs for Generalised Quadrangles of Order (3,t)	2000	Willem H. Haemers Edward Spence
+	Spectral characterizations of some distance-regular graphs	2000	Edwin van Dam Willem H. Haemers
+ PDF Chat	Minimum resolvable coverings with small parallel classes	1999	Willem H. Haemers
+ PDF Chat	Minimum resolvable coverings with small parallel classes	1999	Willem H. Haemers
+	None	1999	Willem H. Haemers René Peeters J.M. van Rijckevorsel
+ PDF Chat	Deza graphs: A generalization of strongly regular graph	1999	Martin Erickson S. Fernando Willem H. Haemers Darel W. Hardy Joe Hemmeter
+	The Search for Pseudo Orthogonal Latin Squares of Order Six	1999	F.C. Bussemaker Willem H. Haemers Edward Spence
+	Minimum resolvable coverings with small parallel classes	1999	Willem H. Haemers
+	Bicliques and Eigenvalues	1999	Willem H. Haemers
+	Minimum resolvable coverings with small parallel classes	1999	Willem H. Haemers
+	Deza graphs: A generalization of strongly regular graph	1999	Martin Erickson S. Fernando Willem H. Haemers Darel W. Hardy Joe Hemmeter
+	Graphs with constant μ and μ	1998	Edwin van Dam Willem H. Haemers
+	Graphs with constant mu and mu-bar	1998	Edwin van Dam Willem H. Haemers
+	Proceedings of the 3rd international conference on finite geometries and combinatorics at Deinze	1998	Frank De Clerck Albrecht Beutelspacher A. Blokhuis Francis Buekenhout Jean Doyen Willem H. Haemers Jwp Hirschfeld J. A. Thas Hendrik Van Maldeghem
+	Graphs with constant mu and mu-bar	1998	Edwin van Dam Willem H. Haemers
+ PDF Chat	Disconnected Vertex Sets and Equidistant Code Pairs	1997	Willem H. Haemers
+ PDF Chat	None	1997	Edwin van Dam Willem H. Haemers
+	A characterization of distance-regular graphs with diameter three	1997	Willem H. Haemers Edwin van Dam
+	Spreads in strongly regular graphs	1996	Willem H. Haemers Vladimir D. Tonchev
+	Distance-regularity and the spectrum of graphs	1996	Willem H. Haemers
+	Spreads in Strongly Regular Graphs	1996	Willem H. Haemers Vladimir D. Tonchev
+	Disconnected vertex sets and equidistant code pairs	1996	Willem H. Haemers
+	Spreads in strongly regular graphs	1996	Willem H. Haemers V.D. Touchev
+ PDF Chat	Interlacing eigenvalues and graphs	1995	Willem H. Haemers
+ PDF Chat	Graphs cospectral with distance-regular graphs	1995	Willem H. Haemers Edward Spence
+	Spreads in strongly regular graphs	1995	Willem H. Haemers Vladimir D. Tonchev
+	A characterization of distance-regular graphs with diameter three	1995	Edwin van Dam Willem H. Haemers
+	Graphs with constant μ and μ	1995	Edwin van Dam Willem H. Haemers
+	Interlacing eigenvalues and graphs	1995	Willem H. Haemers
+	Graphs with constant μ and μ	1995	Edwin van Dam Willem H. Haemers
+	Association Schemes	1995	Andries E. Brouwer Willem H. Haemers
+	There exists no (76,21,2,7) strongly regular graph	1993	Willem H. Haemers
+	Finite Geometries and Combinatorics	1993	Frank De Clerck Frank De Clerck Albrecht Beutelspacher Laura Bader R. D. Baker A. Blokhuis A. Blokhuis A.E. Brouwer A.E. Brouwer Francis Buekenhout
+	The Gewirtz Graph: An Exercise in the Theory of Graph Spectra	1993	A.E. Brouwer Willem H. Haemers
+	Eigenvalues and the diameter of graphs	1993	Edwin van Dam Willem H. Haemers
+	Graphs cospectral with distance-regular graphs	1993	Willem H. Haemers Edward Spence
+	Graphs cospectral with distance-regular graphs	1993	Willem H. Haemers Edward Spence
+	Structure and uniqueness of the (81, 20, 1, 6) strongly regular graph	1992	A.E. Brouwer Willem H. Haemers
+	Some 2-ranks	1992	A.E. Brouwer H.A. Wilbrink Willem H. Haemers
+	Distance regularity and the spectrum of graphs	1992	Willem H. Haemers
+ PDF Chat	Strongly regular graphs induced by polarities of symmetric designs	1991	Willem H. Haemers D. G. Higman S A Hobar
+	Regular 2-Graphs and Extensions of Partial Geometries	1991	Willem H. Haemers
+	The Gewirtz graph : An exercise in the theory of graph spectra	1991	A.E. Brouwer Willem H. Haemers
+	The Gewirtz graph: An exercise in the theory of graph spectra	1991	A.E. Brouwer Willem H. Haemers
+	A (49, 16, 3, 6) Strongly Regular Graph Does Not Exist	1989	F.C. Bussemaker Willem H. Haemers R. Matron H.A. Wilbrink
+	Strongly regular graphs with strongly regular decomposition	1989	Willem H. Haemers D. G. Higman
+	On (v, k, λ) graphs and designs with trivial automorphism group	1989	F.C. Bussemaker Willem H. Haemers J.J. Seidel Edward Spence
+	Regular two-graphs and extensions of partial geometries	1989	Willem H. Haemers
+	Regular two-graphs and extensions of partial geometries	1989	Willem H. Haemers
+	A (49,16,3,6) strongly regular graph does not exist	1988	F.C. Bussemaker Willem H. Haemers Rudolf Mathon H.A. Wilbrink
+	A (49,16,3,6) strongly regular graph does not exist	1988	F.C. Bussemaker Willem H. Haemers Rudolf Mathon H.A. Wilbrink
+	On (v,k,labda) graphs and designs with trivial automorphism group	1987	F.C. Bussemaker Willem H. Haemers J.J. Seidel Edward Spence
+	On (v,k,labda) graphs and designs with trivial automorphism group	1987	F.C. Bussemaker Willem H. Haemers J.J. Seidel Edward Spence
+	A Partial Geometry pg(9, 8, 4)	1982	Willem H. Haemers J.H. van Lint
+	A new partial geometry constructed from the Hoffman-Singleton graph	1981	Willem H. Haemers
+	An inequality for generalized hexagons	1981	Willem H. Haemers C. Roos
+	On Some Problems of Lovász Concerning the Shannon Capacity of a Graph	1979	Willem H. Haemers
+	A generalization of the Higman-Sims technique	1978	Willem H. Haemers
+	A generalization of the Higman-Sims technique	1978	Willem H. Haemers
+	Some remarks on subdesigns of symmetric designs	1977	Willem H. Haemers Shrikhande

Common Coauthors

Coauthor	Papers Together
Edwin van Dam	30
Andries E. Brouwer	24
Edward Spence	17
Sebastian M. Cioabă	16
Aida Abiad	14
Hatice Topçu	14
A.E. Brouwer	12
Leila Parsaei Majd	9
F.C. Bussemaker	8
Leonid Shalaginov	8
Jack H. Koolen	8
Sezer Sorgun	8
Jason R. Vermette	7
Saieed Akbari	7
Hamid Reza Maimani	6
V. V. Kabanov	6
Sergey Goryainov	4
Elena V. Konstantinova	4
M. A. Fiol	4
Guillem Perarnau	4
Farzaneh Ramezani	4
H.A. Wilbrink	4
Mohammad Ali Hosseinzadeh	4
René Peeters	3
Mohammad Reza Oboudi	3
A. Mohammadian	3
B. Tayfeh‐Rezaie	3
Omid Etesami	3
Krystal Guo	3
M.J.P. Peeters	3
Travis Johnston	3
Matt McGinnis	3
Marc Cámara	3
Ebrahim Ghorbani	3
Zoltán L. Blázsik	3
Aart Blokhuis	3
G.R. Omidi	3
Vladimir D. Tonchev	3
Jay Cummings	3
J. Hemmeter	2
Wiseley Wong	2
Francis Buekenhout	2
Rudolf Mathon	2
Martin Erickson	2
Darel W. Hardy	2
Steve Butler	2
J.J. Seidel	2
Jozefien D’haeseleer	2
Robin Simoens	2
Qing Xiang	2

Commonly Cited References

Action	Title	Year	Authors	# of times referenced
+	Spectra of Graphs	2011	Andries E. Brouwer Willem H. Haemers	39
+	Distance-Regular Graphs	2011	Andries E. Brouwer Willem H. Haemers	35
+	Constructing cospectral graphs	1982	Chris Godsil Brendan D. McKay	33
+ PDF Chat	Which graphs are determined by their spectrum?	2003	Edwin van Dam Willem H. Haemers	32
+	Distance-Regular Graphs	1989	Andries E. Brouwer Arjeh M. Cohen Arnold Neumaier	30
+ PDF Chat	Interlacing eigenvalues and graphs	1995	Willem H. Haemers	21
+	Spectra of graphs	1980	Cvetkovi cacute Mikhina Vs Michael Doob H. Sachs	21
+	Developments on spectral characterizations of graphs	2008	Edwin van Dam Willem H. Haemers	13
+	Characterizing distance-regularity of graphs by the spectrum	2006	Edwin van Dam Willem H. Haemers Jack H. Koolen Edward Spence	13
+	Spectra of graphs : theory and application	1995	Dragoš Cvetković Michael Doob H. Sachs	11
+	Algebraic Graph Theory	2009	Chris Godsil Gordon Royle	11
+	Distance-regularity and the spectrum of graphs	1996	Willem H. Haemers	11
+	Regular graphs with four eigenvalues	1995	Edwin van Dam	11
+	On the Shannon capacity of a graph	1979	László Lovász	10
+ PDF Chat	Graphs cospectral with distance-regular graphs	1995	Willem H. Haemers Edward Spence	10
+	The Gewirtz Graph: An Exercise in the Theory of Graph Spectra	1993	A.E. Brouwer Willem H. Haemers	10
+	Algebraic Graph Theory	1974	Norman Biggs	9
+	Strongly regular graphs and partial geometries	2001	J.H. van Lint R. M. Wilson	9
+	Spectral Characterization of Some Generalized Odd Graphs	1999	Tayuan Huang Chao-Rong Liu	9
+	Graphs with constant μ and μ	1998	Edwin van Dam Willem H. Haemers	9
+ PDF Chat	Enumeration of cospectral graphs	2003	Willem H. Haemers Edward Spence	9
+	Strongly regular graphs with (—1,1,0) adjacency matrix having eigenvalue 3	1968	J.J. Seidel	9
+	Strongly regular graphs having strongly regular subconstituents	1978	Peter J‎. Cameron J.-M. Goethals J.J. Seidel	8
+	Spreads in strongly regular graphs	1996	Willem H. Haemers Vladimir D. Tonchev	8
+	Classification of regular two-graphs on 36 and 38 vertices.	2001	Brendan D. McKay Edward Spence	8
+ PDF Chat	Combinatorial Matrix Theory	1991	Richard A. Brualdi H. J. Ryser	8
+	An introduction to the theory of graph spectra	2010	Dragoš Cvetković Peter Rowlinson Slobodan Simić	7
+	Matchings in regular graphs from eigenvalues	2008	Sebastian M. Cioabă David A. Gregory Willem H. Haemers	7
+ PDF Chat	Deza graphs: A generalization of strongly regular graph	1999	Martin Erickson S. Fernando Willem H. Haemers Darel W. Hardy Joe Hemmeter	7
+	Eigenvalues and perfect matchings	2004	Andries E. Brouwer Willem H. Haemers	7
+	Strongly regular graphs with smallest eigenvalue ?m	1979	Arnold Neumaier	7
+	Spectral Generalizations of Line Graphs: On Graphs with Least Eigenvalue -2	2004	Dragoš Cvetković Peter Rowlinson Slobodan Simić	6
+ PDF Chat	The graphs with all but two eigenvalues equal to $$\pm 1$$ ± 1	2014	Sebastian M. Cioabă Willem H. Haemers Jason R. Vermette Wiseley Wong	6
+ PDF Chat	Graphs and their spectra	1989	J.J. Seidel	6
+	Divisible design graphs	2010	Willem H. Haemers Hadi Kharaghani Maaike A. Meulenberg	6
+	The Energy of a Graph: Old and New Results	2001	Iván Gutman	6
+ PDF Chat	Strongly regular graphs with maximal energy	2008	Willem H. Haemers	6
+	Cospectral graphs and the generalized adjacency matrix	2006	Edwin van Dam Willem H. Haemers Jack H. Koolen	6
+	The Laplacian Spectrum of a Graph II	1994	Robert Grone Russell Merris	6
+	Maximal Energy Graphs	2001	Jack H. Koolen Vincent Moulton	6
+	Strongly regular graphs	1975	Xavier Hubaut	6
+ PDF Chat	None	1992	A.E. Brouwer C.A. van Eijl	6
+ PDF Chat	Open problems in the spectral theory of signed graphs	2019	Francesco Belardo Sebastian M. Cioabă Jack H. Koolen Jianfeng Wang	6
+	Strongly Regular Graphs	2011	Andries E. Brouwer Willem H. Haemers	5
+	Walk-regular divisible design graphs	2013	Dean Crnković Willem H. Haemers	5
+	A (57, 14, 1) strongly regular graph does not exist	1983	H.A. Wilbrink A.E. Brouwer	5
+	Strongly regular graphs	1979	J.J. Seidel	5
+	Multiplicative cones — a family of three eigenvalue graphs	1981	William Bridges R.A Mena	5
+	Conference matrices and graphs of order 26	1973	Alexander Paulus	5
+	ON EIGENVALUES AND COLORINGS OF GRAPHS, II	1970	Alan J. Hoffman Leonard Howes	5