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1

A relationship between the diameter and the intersection numberc2for a distance-regular graph

Jack H. Koolen, Jongyook Park

Journal:

Designs, Codes and Cryptography

Year:

2012

Language:

english

File:

PDF, 182 KB

english, 2012

2

Shilla distance-regular graphs

Jack H. Koolen, Jongyook Park

Journal:

European Journal of Combinatorics

Year:

2010

Language:

english

File:

PDF, 313 KB

english, 2010

3

An inequality involving the second largest and smallest eigenvalue of a distance-regular graph

Jack H. Koolen, Jongyook Park, Hyonju Yu

Journal:

Linear Algebra and its Applications

Year:

2011

Language:

english

File:

PDF, 221 KB

english, 2011

4

Genus polynomials of cycles with double edges

Eunyoung Baek, Jongyook Park

Journal:

Acta Mathematica Sinica, English Series (Springer)

Year:

2011

Language:

english

File:

PDF, 322 KB

english, 2011

5

Distance-regular graphs with or at least half the valency

Jack H. Koolen, Jongyook Park

Journal:

Journal of Combinatorial Theory, Series A

Year:

2012

Language:

english

File:

PDF, 189 KB

english, 2012

6

On electric resistances for distance-regular graphs

Koolen, Jack H., Markowsky, Greg, Park, Jongyook

Journal:

European Journal of Combinatorics

Year:

2013

Language:

english

File:

PDF, 290 KB

english, 2013

7

There are only finitely many distance-regular graphs with valency k at least three, fixed ratio and large diameter

Park, Jongyook, Koolen, Jack H., Markowsky, Greg

Journal:

Journal of Combinatorial Theory, Series B

Year:

2013

Language:

english

File:

PDF, 526 KB

english, 2013

8

A note on distance-regular graphs with a small number of vertices compared to the valency

Koolen, Jack H., Park, Jongyook

Journal:

European Journal of Combinatorics

Year:

2013

Language:

english

File:

PDF, 372 KB

english, 2013

9

Geometric aspects of 2-walk-regular graphs

Cámara, Marc, van Dam, Edwin R., Koolen, Jack H., Park, Jongyook

Journal:

Linear Algebra and its Applications

Year:

2013

Language:

english

File:

PDF, 366 KB

english, 2013

10

2-Walk-regular graphs with a small number of vertices compared to the valency

Qiao, Zhi, Koolen, Jack H., Park, Jongyook

Journal:

Linear Algebra and its Applications

Year:

2016

Language:

english

File:

PDF, 415 KB

english, 2016

11

The distance-regular graphs with valency k

Journal:

Discrete Mathematics

Year:

2017

Language:

english

File:

PDF, 478 KB

english, 2017

12

Partially metric association schemes with a multiplicity three

van Dam, Edwin R., Koolen, Jack H., Park, Jongyook

Journal:

Journal of Combinatorial Theory, Series B

Year:

2017

Language:

english

File:

PDF, 1.46 MB

english, 2017

13

On 2-walk-regular graphs with a large intersection number

Qiao, Zhi, Park, Jongyook, Koolen, Jack H.

Journal:

European Journal of Combinatorics

Year:

2018

Language:

english

File:

PDF, 355 KB

english, 2018

14

On Q-integral graphs with edge-degrees at most six

Park, Jongyook, Sano, Yoshio

Journal:

Linear Algebra and its Applications

Year:

2019

Language:

english

File:

PDF, 402 KB

english, 2019

15

There Does Not Exist a Distance-Regular Graph with Intersection Array $$\{80, 54,12; 1, 6, 60\}$$ { 80 , 54 , 12 ; 1 , 6 , 60 }

Koolen, Jack H., Iqbal, Quaid, Park, Jongyook, Ur Rehman, Masood

Journal:

Graphs and Combinatorics

Year:

2019

Language:

english

File:

PDF, 284 KB

english, 2019

16

Distance-regular graphs with diameter 3 and eigenvalue a2 − c3

Iqbal, Quaid, Koolen, Jack H., Park, Jongyook, Rehman, Masood Ur

Journal:

Linear Algebra and its Applications

Year:

2019

Language:

english

File:

PDF, 354 KB

english, 2019

17

On the nonexistence of pseudo-generalized quadrangles

Guo, Ivan, Koolen, Jack H., Markowsky, Greg, Park, Jongyook

Journal:

European Journal of Combinatorics

Year:

2020

File:

PDF, 323 KB

2020