Jacobus H. Koolen

Publication Activity (10 Years)

Years Active: 1990-2019
Publications (10 Years): 6

Top Topics

Pairwise Similarities

Dimensional Euclidean Space

Top Venues

J. Comb. Theory, Ser. A

Discret. Math. Theor. Comput. Sci.

J. Comb. Theory, Ser. B

Publications

Zhi Qiao, Jacobus H. Koolen
A new characterization of the dual polar graphs. J. Comb. Theory, Ser. B 135 (2019)
Zhi Qiao, Jacobus H. Koolen
A valency bound for distance-regular graphs. J. Comb. Theory, Ser. A 155 (2018)
Sebastian M. Cioaba, Jacobus H. Koolen, Weiqiang Li
Max-cut and extendability of matchings in distance-regular graphs. Eur. J. Comb. 62 (2017)
Andreas W. M. Dress, Katharina T. Huber, Jacobus H. Koolen, Vincent Moulton, Andreas Spillner
Characterizing block graphs in terms of their vertex-induced partitions. Australas. J Comb. 66 (2016)
Gary R. W. Greaves, Jacobus H. Koolen, Akihiro Munemasa, Ferenc Szöllösi
Equiangular lines in Euclidean spaces. J. Comb. Theory, Ser. A 138 (2016)
Jacobus H. Koolen, Woo-Sun Lee, William J. Martin, Hajime Tanaka
Arithmetic completely regular codes. Discret. Math. Theor. Comput. Sci. 17 (3) (2016)
Sejeong Bang, Jacobus H. Koolen
On geometric distance-regular graphs with diameter three. Eur. J. Comb. 36 (2014)
Andreas W. M. Dress, Katharina T. Huber, Jacobus H. Koolen, Vincent Moulton
Blocks and Cut Vertices of the Buneman Graph. SIAM J. Discret. Math. 25 (4) (2011)
Saieed Akbari, Ebrahim Ghorbani, Jacobus H. Koolen, Mohammad Reza Oboudi
On Sum of Powers of the Laplacian and Signless Laplacian Eigenvalues of Graphs. Electron. J. Comb. 17 (1) (2010)
Andreas W. M. Dress, Katharina T. Huber, Jacobus H. Koolen, Vincent Moulton, Andreas Spillner
An Algorithm for Computing Cutpoints in Finite Metric Spaces. J. Classif. 27 (2) (2010)
Jacobus H. Koolen, Sejeong Bang
On distance-regular graphs with smallest eigenvalue at least -m. J. Comb. Theory, Ser. B 100 (6) (2010)
Greg Markowsky, Jacobus H. Koolen
A Conjecture of Biggs Concerning the Resistance of a Distance-Regular Graph. Electron. J. Comb. 17 (1) (2010)
Jacobus H. Koolen, Woo-Sun Lee, William J. Martin
Arithmetic completely regular codes CoRR (2009)
Andreas W. M. Dress, Katharina T. Huber, Jacobus H. Koolen, Vincent Moulton, Andreas Spillner
An algorithm for computing cutpoints in finite metric spaces CoRR (2009)
Andreas W. M. Dress, Katharina T. Huber, Jacobus H. Koolen, Vincent Moulton
A graph-theoretical invariant of topological spaces. Appl. Math. Lett. 22 (2) (2009)
Stefan Grünewald, Jacobus H. Koolen, Woo-Sun Lee
Quartets in maximal weakly compatible split systems. Appl. Math. Lett. 22 (10) (2009)
Andreas W. M. Dress, Katharina T. Huber, Jacobus H. Koolen, Vincent Moulton
Compatible decompositions and block realizations of finite metrics. Eur. J. Comb. 29 (7) (2008)
Katharina T. Huber, Jacobus H. Koolen, Vincent Moulton, Andreas Spillner
Characterizing Cell-Decomposable Metrics. Electron. J. Comb. 15 (1) (2008)
Y. B. Choe, Katharina T. Huber, Jacobus H. Koolen, Y. S. Kwon, Vincent Moulton
Counting vertices and cubes in median graphs of circular split systems. Eur. J. Comb. 29 (2) (2008)
Andreas W. M. Dress, Katharina T. Huber, Jacobus H. Koolen, Vincent Moulton
Block realizations of finite metrics and the tight-span construction I: The embedding theorem. Appl. Math. Lett. 21 (12) (2008)
Andreas W. M. Dress, Katharina T. Huber, Jacobus H. Koolen, Vincent Moulton
Cut points in metric spaces. Appl. Math. Lett. 21 (6) (2008)
Sejeong Bang, Jacobus H. Koolen, Vincent Moulton
Two theorems concerning the Bannai-Ito conjecture. Eur. J. Comb. 28 (7) (2007)
Andreas W. M. Dress, Katharina T. Huber, Jacobus H. Koolen, Vincent Moulton
An Algorithm for Computing Virtual Cut Points in Finite Metric Spaces. COCOA (2007)
Sejeong Bang, Akira Hiraki, Jacobus H. Koolen
Delsarte clique graphs. Eur. J. Comb. 28 (2) (2007)
Sejeong Bang, Akira Hiraki, Jacobus H. Koolen
Improving diameter bounds for distance-regular graphs. Eur. J. Comb. 27 (1) (2006)
Katharina T. Huber, Jacobus H. Koolen, Vincent Moulton
On the structure of the tight-span of a totally split-decomposable metric. Eur. J. Comb. 27 (3) (2006)
Edwin R. van Dam, Willem H. Haemers, Jacobus H. Koolen, Edward Spence
Characterizing distance-regularity of graphs by the spectrum. J. Comb. Theory, Ser. A 113 (8) (2006)
Katharina T. Huber, Jacobus H. Koolen, Vincent Moulton
The tight span of an antipodal metric space - Part I: : Combinatorial properties. Discret. Math. 303 (1-3) (2005)
Katharina T. Huber, Jacobus H. Koolen, Vincent Moulton
The Tight Span of an Antipodal Metric Space: Part II--Geometrical Properties. Discret. Comput. Geom. 31 (4) (2004)
Aleksandar Jurisic, Jacobus H. Koolen
Krein parameters and antipodal tight graphs with diameter 3 and 4. Discret. Math. 244 (1-3) (2002)
Andreas W. M. Dress, Katharina T. Huber, Jacobus H. Koolen, Vincent Moulton
Six Points Suffice: How to Check for Metric Consistency. Eur. J. Comb. 22 (4) (2001)
Jacobus H. Koolen
A Characterization of the Doob Graphs. J. Comb. Theory, Ser. B 65 (1) (1995)
Andries E. Brouwer, Jacobus H. Koolen
A new infinite series of regular uniformly geodetic code graphs. Discret. Math. 120 (1-3) (1993)
Jacobus H. Koolen
On uniformly geodetic graphs. Graphs Comb. 9 (2-4) (1993)
J. M. van den Akker, Jacobus H. Koolen, Rob J. M. Vaessens
Perfect modes with distinct protective radii. Discret. Math. 81 (1) (1990)