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Koolen, Jack H.
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1

Distance-regular graphs with exactly one positive q-distanc..:

Koolen, Jack H. ; Abdullah, Mamoon ; Gebremichel, Brhane.
Linear Algebra and its Applications.  689 (2024)  - p. 230-246 , 2024
Link: https://doi.org/10.1016/..
 
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2

Extending a conjecture of Graham and Lovász on the distance..:

Abiad, Aida ; Brimkov, Boris ; Hayat, Sakander..
Linear Algebra and its Applications.  693 (2024)  - p. 63-82 , 2024
Link: https://doi.org/10.1016/..
 
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3

Distance-regular graphs with a few q-distance eigenvalues:

Abdullah, Mamoon ; Gebremichel, Brhane ; Hayat, Sakander.
Discrete Mathematics.  347 (2024)  5 - p. 113926 , 2024
Link: https://doi.org/10.1016/..
 
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4

Correction to: Thin Q-Polynomial Distance-Regular Graphs Ha..:

Tan, Ying-Ying ; Koolen, Jack H. ; Cao, Meng-Yue.
Graphs and Combinatorics.  39 (2023)  1 - p. , 2023
Link: https://doi.org/10.1007/..
 
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5

On association schemes generated by a relation or an idempo..:

Xia, Tian-Tian ; Tan, Ying-Ying ; Liang, Xiaoye.
Linear Algebra and its Applications.  670 (2023)  - p. 1-18 , 2023
Link: https://doi.org/10.1016/..
 
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6

An infinite class of Neumaier graphs and non-existence resu..:

Abiad, Aida ; Castryck, Wouter ; De Boeck, Maarten..
Journal of Combinatorial Theory, Series A.  193 (2023)  - p. 105684 , 2023
Link: https://doi.org/10.1016/..
 
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7

Sesqui-regular graphs with fixed smallest eigenvalue:

Koolen, Jack H. ; Gebremichel, Brhane ; Yang, Jae Young.
Linear Algebra and its Applications.  668 (2023)  - p. 1-10 , 2023
Link: https://doi.org/10.1016/..
 
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8

Remarks on pseudo-vertex-transitive graphs with small diame..:

Koolen, Jack H. ; Lee, Jae-Ho ; Tan, Ying-Ying
Discrete Mathematics.  345 (2022)  10 - p. 112990 , 2022
Link: https://doi.org/10.1016/..
 
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9

Thin Q-Polynomial Distance-Regular Graphs Have Bounded $$c_..:

Tan, Ying-Ying ; Koolen, Jack H. ; Cao, Meng-Yue.
Graphs and Combinatorics.  38 (2022)  6 - p. , 2022
Link: https://doi.org/10.1007/..
 
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10

On the spectrum and linear programming bound for hypergraph:

Cioabă, Sebastian M. ; Koolen, Jack H. ; Mimura, Masato..
European Journal of Combinatorics.  104 (2022)  - p. 103535 , 2022
Link: https://doi.org/10.1016/..
 
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11

The 2-partially distance-regular graphs such that their sec..:

Zhang, Yuanjiang ; Liang, Xiaoye ; Koolen, Jack H.
Discrete Mathematics.  345 (2022)  3 - p. 112749 , 2022
Link: https://doi.org/10.1016/..
 
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12

The Lemmens-Seidel conjecture and forbidden subgraphs:

Cao, Meng-Yue ; Koolen, Jack H. ; Lin, Yen-Chi Roger.
Journal of Combinatorial Theory, Series A.  185 (2022)  - p. 105538 , 2022
Link: https://doi.org/10.1016/..
 
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13

Recent Progress on Graphs with Fixed Smallest Adjacency Eig..:

Koolen, Jack H. ; Cao, Meng-Yue ; Yang, Qianqian
Graphs and Combinatorics.  37 (2021)  4 - p. 1139-1178 , 2021
Link: https://doi.org/10.1007/..
 
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14

Maximality of Seidel matrices and switching roots of graphs:

Cao, Meng-Yue ; Koolen, Jack H. ; Munemasa, Akihiro.
Graphs and Combinatorics.  37 (2021)  5 - p. 1491-1507 , 2021
Link: https://doi.org/10.1007/..
 
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15

On the order of regular graphs with fixed second largest ei..:

Yang, Jae Young ; Koolen, Jack H.
Linear Algebra and its Applications.  610 (2021)  - p. 29-39 , 2021
Link: https://doi.org/10.1016/..
 
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