World's Best Scientists 2026 revealed!
Yoshiharu Kohayakawa

Yoshiharu Kohayakawa

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Mathematics 39 2254 1996 18 18 177 4353
Computer Science 38 10414 10122 33 33 175 4247

Yoshiharu Kohayakawa publications per year

The chart shows the history of publications by Yoshiharu Kohayakawa between 1990 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Yoshiharu Kohayakawa published across 36 years, from 1990 to 2025, averaging 5.4 papers a year. Output peaked at 15 publications in 2021. 3 of the 193 publications appeared in the last two years.

No. of publications
5 10 15
Bar chart. Horizontal axis: year, 1990 to 2025. Vertical axis: number of publications, 0 to 15. Peak 15 publications in 2021. 1990: 1 publication 1991: 1 publication 1992: 3 publications 1993: 1 publication 1994: 5 publications 1995: 6 publications 1996: 4 publications 1997: 5 publications 1998: 4 publications 1999: 0 publications 2000: 8 publications 2001: 2 publications 2002: 6 publications 2003: 7 publications 2004: 8 publications 2005: 5 publications 2006: 3 publications 2007: 6 publications 2008: 3 publications 2009: 1 publication 2010: 3 publications 2011: 12 publications 2012: 6 publications 2013: 7 publications 2014: 6 publications 2015: 9 publications 2016: 6 publications 2017: 10 publications 2018: 6 publications 2019: 10 publications 2020: 8 publications 2021: 15 publications 2022: 6 publications 2023: 7 publications 2024: 2 publications 2025: 1 publication
1990 2025

193 publications in total across all disciplines

View publications per year as a table
Yoshiharu Kohayakawa: publications per year, 1990 to 2025
Year Publications
1990 1
1991 1
1992 3
1993 1
1994 5
1995 6
1996 4
1997 5
1998 4
1999 0
2000 8
2001 2
2002 6
2003 7
2004 8
2005 5
2006 3
2007 6
2008 3
2009 1
2010 3
2011 12
2012 6
2013 7
2014 6
2015 9
2016 6
2017 10
2018 6
2019 10
2020 8
2021 15
2022 6
2023 7
2024 2
2025 1
Total 193
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Yoshiharu Kohayakawa publication distribution in Mathematics in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Mathematics in 2026. The highlighted bar marks where Yoshiharu Kohayakawa sits on this spectrum.

No. of scientists
25 50 75 100
Bar chart with 100 bars. Horizontal axis: publications, 42–46 to 537+. Vertical axis: number of scientists, 0 to 112. Most scientists, 112, have 142–146 publications. The last bar groups every scientist with 537 publications or more. The highlighted bar, 177–181 publications, is where this scientist sits. 42–46 publications: 3 scientists 47–51 publications: 5 scientists 52–56 publications: 7 scientists 57–61 publications: 20 scientists 62–66 publications: 14 scientists 67–71 publications: 25 scientists 72–76 publications: 19 scientists 77–81 publications: 35 scientists 82–86 publications: 50 scientists 87–91 publications: 60 scientists 92–96 publications: 86 scientists 97–101 publications: 84 scientists 102–106 publications: 83 scientists 107–111 publications: 90 scientists 112–116 publications: 99 scientists 117–121 publications: 90 scientists 122–126 publications: 91 scientists 127–131 publications: 109 scientists 132–136 publications: 110 scientists 137–141 publications: 98 scientists 142–146 publications: 112 scientists 147–151 publications: 102 scientists 152–156 publications: 88 scientists 157–161 publications: 106 scientists 162–166 publications: 83 scientists 167–171 publications: 102 scientists 172–176 publications: 77 scientists 177–181 publications: 81 scientists 182–186 publications: 78 scientists 187–191 publications: 71 scientists 192–196 publications: 92 scientists 197–201 publications: 64 scientists 202–206 publications: 69 scientists 207–211 publications: 64 scientists 212–216 publications: 62 scientists 217–221 publications: 58 scientists 222–226 publications: 53 scientists 227–231 publications: 50 scientists 232–236 publications: 46 scientists 237–241 publications: 46 scientists 242–246 publications: 46 scientists 247–251 publications: 43 scientists 252–256 publications: 29 scientists 257–261 publications: 45 scientists 262–266 publications: 30 scientists 267–271 publications: 33 scientists 272–276 publications: 34 scientists 277–281 publications: 30 scientists 282–286 publications: 31 scientists 287–291 publications: 21 scientists 292–296 publications: 34 scientists 297–301 publications: 26 scientists 302–306 publications: 10 scientists 307–311 publications: 17 scientists 312–316 publications: 23 scientists 317–321 publications: 13 scientists 322–326 publications: 16 scientists 327–331 publications: 26 scientists 332–336 publications: 13 scientists 337–341 publications: 13 scientists 342–346 publications: 16 scientists 347–351 publications: 17 scientists 352–356 publications: 12 scientists 357–361 publications: 18 scientists 362–366 publications: 18 scientists 367–371 publications: 9 scientists 372–376 publications: 11 scientists 377–381 publications: 8 scientists 382–386 publications: 8 scientists 387–391 publications: 9 scientists 392–396 publications: 9 scientists 397–401 publications: 8 scientists 402–406 publications: 11 scientists 407–411 publications: 6 scientists 412–416 publications: 6 scientists 417–421 publications: 9 scientists 422–426 publications: 8 scientists 427–431 publications: 5 scientists 432–436 publications: 8 scientists 437–441 publications: 8 scientists 442–446 publications: 4 scientists 447–451 publications: 4 scientists 452–456 publications: 4 scientists 457–461 publications: 2 scientists 462–466 publications: 2 scientists 467–471 publications: 4 scientists 472–476 publications: 3 scientists 477–481 publications: 3 scientists 482–486 publications: 6 scientists 487–491 publications: 3 scientists 492–496 publications: 5 scientists 497–501 publications: 5 scientists 502–506 publications: 1 scientist 507–511 publications: 6 scientists 512–516 publications: 4 scientists 517–521 publications: 1 scientist 522–526 publications: 3 scientists 527–531 publications: 1 scientist 532–536 publications: 4 scientists 537+ publications: 100 scientists
42–46 publications 537+

This scientist: 177 publications — 52nd percentile

52% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 537 publications or more.

View publications distribution as a table
Number of Mathematics scientists by publication count, Research.com 2026 ranking edition. Based on 3,584 ranked scientists.
Publications Scientists This scientist
42–46 3
47–51 5
52–56 7
57–61 20
62–66 14
67–71 25
72–76 19
77–81 35
82–86 50
87–91 60
92–96 86
97–101 84
102–106 83
107–111 90
112–116 99
117–121 90
122–126 91
127–131 109
132–136 110
137–141 98
142–146 112
147–151 102
152–156 88
157–161 106
162–166 83
167–171 102
172–176 77
177–181 81 177
182–186 78
187–191 71
192–196 92
197–201 64
202–206 69
207–211 64
212–216 62
217–221 58
222–226 53
227–231 50
232–236 46
237–241 46
242–246 46
247–251 43
252–256 29
257–261 45
262–266 30
267–271 33
272–276 34
277–281 30
282–286 31
287–291 21
292–296 34
297–301 26
302–306 10
307–311 17
312–316 23
317–321 13
322–326 16
327–331 26
332–336 13
337–341 13
342–346 16
347–351 17
352–356 12
357–361 18
362–366 18
367–371 9
372–376 11
377–381 8
382–386 8
387–391 9
392–396 9
397–401 8
402–406 11
407–411 6
412–416 6
417–421 9
422–426 8
427–431 5
432–436 8
437–441 8
442–446 4
447–451 4
452–456 4
457–461 2
462–466 2
467–471 4
472–476 3
477–481 3
482–486 6
487–491 3
492–496 5
497–501 5
502–506 1
507–511 6
512–516 4
517–521 1
522–526 3
527–531 1
532–536 4
537+ 100
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Yoshiharu Kohayakawa D-index placement in Mathematics in 2026

The chart shows the D-index (discipline H-index) distribution of Mathematics scientists ranked by Research.com in 2026. The highlighted bar marks where Yoshiharu Kohayakawa sits on this spectrum.

No. of scientists
50 100 150
Bar chart with 57 bars. Horizontal axis: D-Index, 30 to 86+. Vertical axis: number of scientists, 0 to 174. Most scientists, 174, have 30 D-Index. The last bar groups every scientist with 86 D-Index or more. The highlighted bar, 39 D-Index, is where this scientist sits. 30 D-Index: 174 scientists 31 D-Index: 151 scientists 32 D-Index: 174 scientists 33 D-Index: 117 scientists 34 D-Index: 136 scientists 35 D-Index: 127 scientists 36 D-Index: 145 scientists 37 D-Index: 153 scientists 38 D-Index: 150 scientists 39 D-Index: 150 scientists 40 D-Index: 138 scientists 41 D-Index: 136 scientists 42 D-Index: 93 scientists 43 D-Index: 108 scientists 44 D-Index: 115 scientists 45 D-Index: 112 scientists 46 D-Index: 103 scientists 47 D-Index: 75 scientists 48 D-Index: 59 scientists 49 D-Index: 67 scientists 50 D-Index: 60 scientists 51 D-Index: 57 scientists 52 D-Index: 59 scientists 53 D-Index: 62 scientists 54 D-Index: 60 scientists 55 D-Index: 50 scientists 56 D-Index: 42 scientists 57 D-Index: 54 scientists 58 D-Index: 50 scientists 59 D-Index: 42 scientists 60 D-Index: 41 scientists 61 D-Index: 35 scientists 62 D-Index: 40 scientists 63 D-Index: 21 scientists 64 D-Index: 31 scientists 65 D-Index: 27 scientists 66 D-Index: 29 scientists 67 D-Index: 19 scientists 68 D-Index: 25 scientists 69 D-Index: 17 scientists 70 D-Index: 18 scientists 71 D-Index: 12 scientists 72 D-Index: 14 scientists 73 D-Index: 13 scientists 74 D-Index: 18 scientists 75 D-Index: 9 scientists 76 D-Index: 11 scientists 77 D-Index: 10 scientists 78 D-Index: 9 scientists 79 D-Index: 16 scientists 80 D-Index: 12 scientists 81 D-Index: 10 scientists 82 D-Index: 5 scientists 83 D-Index: 5 scientists 84 D-Index: 13 scientists 85 D-Index: 6 scientists 86+ D-Index: 99 scientists
30 D-Index 86+

This scientist: 39 D-Index — 41st percentile

41% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 86 D-Index or more.

View D-Index distribution as a table
Number of Mathematics scientists by D-index, Research.com 2026 ranking edition. Based on 3,584 ranked scientists.
D-Index Scientists This scientist
30 174
31 151
32 174
33 117
34 136
35 127
36 145
37 153
38 150
39 150 39
40 138
41 136
42 93
43 108
44 115
45 112
46 103
47 75
48 59
49 67
50 60
51 57
52 59
53 62
54 60
55 50
56 42
57 54
58 50
59 42
60 41
61 35
62 40
63 21
64 31
65 27
66 29
67 19
68 25
69 17
70 18
71 12
72 14
73 13
74 18
75 9
76 11
77 10
78 9
79 16
80 12
81 10
82 5
83 5
84 13
85 6
86+ 99
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Research.com Recognitions

  • 2019 - Fellow, The World Academy of Sciences

Overview

Yoshiharu Kohayakawa is affiliated with the Universidade de São Paulo in Brazil and has made significant contributions in the fields of Mathematics and Computer Science. Their research spans multiple subfields, including Computational Theory and Mathematics, Discrete Mathematics and Combinatorics, Geometry and Topology, Mathematical Physics, and Artificial Intelligence.

The primary topics of Yoshiharu Kohayakawa's work include:

  • Limits and Structures in Graph Theory
  • Advanced Graph Theory Research
  • Advanced Topology and Set Theory
  • Graph theory and applications
  • Graph Labeling and Dimension Problems
  • Complexity and Algorithms in Graphs
  • Stochastic processes and statistical mechanics

They have published extensively, with notable papers including:

  • "The anti-Ramsey threshold of complete graphs", 2023, Discrete Mathematics
  • "On strong Sidon sets of integers", 2021, Journal of Combinatorial Theory Series A
  • "The multicolour size-Ramsey number of powers of paths", 2020, Journal of Combinatorial Theory Series B
  • "Estimating parameters associated with monotone properties", 2020, Combinatorics Probability Computing
  • "Finding any given 2-factor in sparse pseudorandom graphs efficiently", 2020, Journal of Graph Theory

Yoshiharu Kohayakawa's frequent coauthors include:

  • Guilherme Oliveira Mota
  • Patrick Morris
  • Fábio Botler
  • Lucas Colucci
  • Jie Han

Their works appear often in certain publication venues, such as:

  • arXiv (Cornell University)
  • Journal of Graph Theory
  • Procedia Computer Science
  • SIAM Journal on Discrete Mathematics
  • Random Structures and Algorithms

Yoshiharu Kohayakawa has also authored books, including "LATIN 2020: Theoretical Informatics," published by Springer Science+Business Media in 2020.

Recognition of their work includes being named a Fellow of The World Academy of Sciences in 2019.

Best Publications

  • Szemerédi's regularity lemma for sparse graphs

    Y. Kohayakawa

  • Limits of permutation sequences

    Carlos Hoppen;Yoshiharu Kohayakawa;Carlos Gustavo Moreira;BaláZs RáTh

  • OnK 4-free subgraphs of random graphs

    Yoshiharu Kohayakawa;Tomasz Luczak;Vojtech Rödl

  • The Induced Size-Ramsey Number of Cycles

    P. E. Haxell;Y. Kohayakawa;T. Łuczak

  • Arithmetic progressions of length three in subsets of a random set

    Yoshiharu Kohayakawa;Tomasz Łuczak;Vojtěch Rödl

  • Szemerédi’s Regularity Lemma and Quasi-randomness

    Y. Kohayakawa;V. Rödl

  • Hypergraphs, Quasi-randomness, and Conditions for Regularity

    Yoshiharu Kohayakawa;Vojtěch Rödl;Jozef Skokan

  • Weak hypergraph regularity and linear hypergraphs

    Yoshiharu Kohayakawa;Brendan Nagle;Vojtěch Rödl;Mathias Schacht

  • The Evolution of Random Subgraphs of the Cube

    B. Bollobás;Y. Kohayakawa;T. Łuczak

  • Measures of pseudorandomness for finite sequences: typical values

    Noga Alon;Yoshiharu Kohayakawa;Christian Mauduit;Carlos Gustavo T. de Moreira

  • Sparse partition universal graphs for graphs of bounded degree

    Yoshiharu Kohayakawa;Vojtěch Rödl;Mathias Schacht;Endre Szemerédi

  • Uma Introdução Sucinta à Teoria dos Grafos

    Paulo Feofiloff;Yoshiharu Kohayakawa;Yoshiko Wakabayashi

  • Tura´n's extremal problem in random graphs: forbidding even cycles

    P. E. Haxell;Y. Kohayakawa;T. Łuczak

  • Threshold functions for asymmetric Ramsey properties involving cycles

    Y. Kohayakawa;B. Kreuter

  • Invariant measures for a two-species asymmetric process

    P. A. Ferrari;L. R. G. Fontes;Y. Kohayakawa

  • Regular pairs in sparse random graphs I

    Y. Kohayakawa;V. Rödl

  • Finding Skew Partitions Efficiently

    Celina M.H. de Figueiredo;Sulamita Klein;Yoshiharu Kohayakawa;Bruce A. Reed

  • Universality and tolerance

    N. Alon;M. Capalbo;Y. Kohayakawa;V. Rodl

  • An Extremal Problem For Random Graphs And The Number Of Graphs With Large Even-Girth

    Yoshiharu Kohayakawa;Bernd Kreuter;Angelika Steger

  • Blow-up lemmas for sparse graphs

    Peter Allen;Julia Böttcher;Hiep Hàn;Yoshiharu Kohayakawa

Frequent Co-Authors

Vojtěch Rödl
Vojtěch Rödl Emory University
Béla Bollobás
Béla Bollobás University of Memphis
Tomasz Łuczak
Tomasz Łuczak Adam Mickiewicz University in Poznań
Andrzej Ruciński
Andrzej Ruciński Adam Mickiewicz University in Poznań
Noga Alon
Noga Alon Tel Aviv University
Endre Szemerédi
Endre Szemerédi Alfréd Rényi Institute of Mathematics
Daniel Král
Daniel Král Masaryk University
Prabhakar Raghavan
Prabhakar Raghavan Google (United States)
Graham Brightwell
Graham Brightwell London School of Economics and Political Science

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