World's Best Scientists 2026 revealed!
Jeffrey Shallit

Jeffrey Shallit

D-Index & Metrics

Mathematics

D-Index
41
Citations
9198
World Ranking
1876
National Ranking
67

Engineering and Technology

D-Index
41
Citations
9005
World Ranking
6841
National Ranking
279

Jeffrey Shallit 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 Jeffrey Shallit sits on this spectrum.

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: 82 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 scientists 507–511 publications: 6 scientists 512–516 publications: 4 scientists 517–521 publications: 1 scientists 522–526 publications: 3 scientists 527–531 publications: 1 scientists 532–536 publications: 4 scientists 537+ publications: 100 scientists
42 publications 537+

This scientist: 414 publications — 94th percentile

94% of scientists in this discipline score the same or lower.

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

Jeffrey Shallit 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 Jeffrey Shallit sits on this spectrum.

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: 137 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: 41 D-Index — 49th percentile

49% of scientists in this discipline score the same or lower.

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

Research.com Recognitions

  • 2008 - ACM Distinguished Member

Overview

Jeffrey Shallit is affiliated with the University of Waterloo in Canada and has a significant body of work in computer science and mathematics. Their research prominently covers various aspects of computational theory and mathematics, artificial intelligence, discrete mathematics and combinatorics, mathematical physics, and algebra and number theory.

The main fields of study associated with their work include:

  • Computer Science
  • Mathematics

Within these fields, the scientist has contributed extensively to several subfields, such as:

  • Computational Theory and Mathematics
  • Artificial Intelligence
  • Discrete Mathematics and Combinatorics
  • Mathematical Physics
  • Algebra and Number Theory

The research topics covered focus on:

  • Semigroups and automata theory
  • Algorithms and data compression
  • Computability, logic, AI algorithms
  • Coding theory and cryptography
  • Advanced combinatorial mathematics
  • Advanced algebra and logic
  • Logic, programming, and type systems

Recent papers authored or co-authored by Jeffrey Shallit include:

  • Decidability for Sturmian words, 2024, published in Logical Methods in Computer Science
  • Ostrowski-automatic sequences: Theory and applications, 2021, published in Theoretical Computer Science
  • Existential Length Universality, 2020, published by Leibniz-Zentrum für Informatik (Schloss Dagstuhl)
  • Discriminators and k-Regular Sequences, 2024, available on arXiv (Cornell University)
  • Sum-free sets generated by the period-k-folding sequences and some Sturmian sequences, 2020, published in Discrete Mathematics

Frequent collaborators include:

  • Narad Rampersad
  • Jean-Paul Allouche
  • James D. Currie
  • Pascal Ochem
  • Luke Schaeffer

The venues where Jeffrey Shallit frequently publishes are:

  • arXiv (Cornell University)
  • Theoretical Computer Science
  • Discrete Mathematics
  • Information Processing Letters
  • Leibniz-Zentrum für Informatik (Schloss Dagstuhl)

Jeffrey Shallit has also published books, including one with Cambridge University Press titled The Logical Approach to Automatic Sequences (2022).

Award recognition includes the ACM Distinguished Member award received in 2008.

Best Publications

  • Automatic Sequences: Theory, Applications, Generalizations

    Jean-Paul Allouche;Jeffrey Shallit

  • Algorithmic number theory

    Eric Bach;Jeffrey Shallit

  • The Ubiquitous Prouhet-Thue-Morse Sequence

    Jean-Paul Allouche;Jeffrey O. Shallit

  • The ring of k -regular sequences, II

    Jean-Paul Allouche;Jeffrey Shallit

  • A Second Course in Formal Languages and Automata Theory

    Jeffrey Shallit

  • Regular expressions: new results and open problems

    Keith Ellul;Bryan Krawetz;Jeffrey Shallit;Ming-wei Wang

  • UNARY LANGUAGE OPERATIONS, STATE COMPLEXITY AND JACOBSTHAL'S FUNCTION

    Giovanni Pighizzini;Jeffrey O. Shallit

  • A lower bound technique for the size of nondeterministic finite automata

    Ian Glaister;Jeffrey Shallit

  • The Computational Complexity of Some Problems of Linear Algebra

    Jonathan F Buss;Gudmund S Frandsen;Jeffrey O Shallit

  • Randomized algorithms in number theory

    J. O. Rabin;Jeffrey Shallit

  • algorithmic number theory / volume 1

    eric Bach;jeffrey shallit

  • Numeration systems, linear recurrences, and regular sets

    Jeffrey Shallit

  • On the number of distinct languages accepted by finite automata with n states

    Michael Domaratzki;Derek Kisman;Jeffrey Shallit

  • Simple continued fractions for some irrational numbers, II

    Jeffrey Shallit

  • Characterizing Regular Languages with Polynomial Densities

    Andrew Szilard;Sheng Yu;Kaizhong Zhang;Jeffrey Shallit

  • Folded continued fractions

    A.J van der Poorten;J Shallit

  • On the iteration of certain quadratic maps over GF(p)

    Troy Vasiga;Jeffrey Shallit

  • Factoring with cyclotomic polynomials

    Eric Bach;Jeffrey Shallit

  • Polynomial versus exponential growth in repetition-free binary words

    Juhani Karhumäki;Jeffrey Shallit

  • ENUMERATION AND DECIDABLE PROPERTIES OF AUTOMATIC SEQUENCES

    Emilie Charlier;Narad Rampersad;Jeffrey O. Shallit

  • ALGEBRAIC COMBINATORICS ON WORDS (Encyclopedia of Mathematics and its Applications 90) By M. LOTHAIRE: 504 pp., £60.00, ISBN 0 521 81220 8 (Cambridge University Press, 2002)

    Jeffrey Shallit

  • The Ring of k-Regular Sequences

    Jean-Paul Allouche;Jeffrey Shallit

  • Automatic Sequences: Uniform Morphisms and Automatic Sequences

    Jean-Paul Allouche;Jeffrey Shallit

  • A Second Course in Formal Languages and Automata Theory: Context-free grammars and languages

    Jeffrey Shallit

Frequent Co-Authors

Wadim Zudilin
Wadim Zudilin Radboud University
Jonathan M. Borwein
Jonathan M. Borwein University of Newcastle Australia
Anna Lubiw
Anna Lubiw University of Waterloo
Gary L. Miller
Gary L. Miller Carnegie Mellon University
Juhani Karhumäki
Juhani Karhumäki University of Turku
Andrew Granville
Andrew Granville University of Montreal
Heinz-Otto Peitgen
Heinz-Otto Peitgen University of Bremen
Yuri Breitbart
Yuri Breitbart Kent State University
Paul Erdös
Paul Erdös Hungarian Academy of Sciences
Charles J. Colbourn
Charles J. Colbourn Arizona State University

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