World's Best Scientists 2026 revealed!
Juhani Karhumäki

Juhani Karhumäki

D-Index & Metrics

Mathematics

D-Index
30
Citations
4083
World Ranking
3502
National Ranking
25

Research.com Recognitions

  • 2006 - Member of Academia Europaea

Overview

Juhani Karhumäki is affiliated with the University of Turku in Finland and specializes primarily in computer science with a focus on computational theory and mathematics. Their research spans several subfields including artificial intelligence, computer vision and pattern recognition, geometry and topology, and electrical and electronic engineering.

The scientist's work explores a variety of topics including:

  • Semigroups and automata theory
  • Machine learning and algorithms
  • Computability, logic, AI algorithms
  • Advanced algebra and logic
  • Handwritten text recognition techniques
  • Geometric and algebraic topology
  • Coding theory and cryptography

Several recent research papers authored by Juhani Karhumäki demonstrate contributions to theoretical computer science and related areas. These include:

  • "On cardinalities of k-abelian equivalence classes," 2022, published in UTUPub (University of Turku)
  • "A compactness property of the k-abelian monoids," 2020, published in Theoretical Computer Science
  • "On abelian closures of infinite non-binary words," 2024, published in Discrete Mathematics
  • "On Abelian Closures of Infinite Non-binary Words," 2020, published in arXiv (Cornell University)

The scientist has also contributed to foundational texts, including a book titled Finite transducers and rational transductions published by EMS Press eBooks in 2021.

Collaboration has been a significant aspect of their work, with frequent co-authors including Markus A. Whiteland, Svetlana Puzynina, Fabian Frei, Juraj Hromkovič, and Jarkko Kari. These professional partnerships extend across multiple scholarly articles and research projects.

Juhani Karhumäki's research has appeared in various publication venues, reflecting an engagement with diverse academic communities. Key venues where their work has been published include:

  • Theoretical Computer Science
  • Fundamenta Informaticae
  • UTUPub (University of Turku)
  • arXiv (Cornell University)
  • Discrete Mathematics

In recognition of their contributions, Juhani Karhumäki was inducted as a member of Academia Europaea in 2006.

Best Publications

  • Combinatorics of words

    Christian Choffrut;Juhani Karhumäki

  • The equivalence problem of multitape finite automata

    T. Harju;J. Karhumäki

  • Combinatorics on words: a tutorial.

    Jean Berstel;Juhani Karhumäki

  • The (generalized) post correspondence problem with lists consisting of two words is decidable

    Andrzej Ehrenfeucht;Juhani Karhumäki;Grzegorz Rozenberg

  • Sofsem 2008: Theory and Practice of Computer Science

    Costas Iliopoulos;M S Rahman;Geffert;J Karhumaki

  • Finite Automata Computing Real Functions

    Karel Culik;Juhani Karhumaki

  • The expressibility of languages and relations by word equations

    Juhani Karhumäki;Filippo Mignosi;Wojciech Plandowski

  • On cube-free ω-words generated by binary morphisms

    Juhani Karhumäki

  • Communication complexity method for measuring nondeterminism in finite automata

    Juraj Karhuäki;Sebastian Seibert;Juhani Karhumaki;Hartmut Klauck

  • Systems of equations over a free monoid and Ehrenfeucht's conjecture

    Karel Culik;Juhani Karhumäki

  • Jewels are Forever

    Juhani Karhumäki;Hermann Maurer;Gheorghe Păun;Grzegorz Rozenberg

  • Polynomial versus exponential growth in repetition-free binary words

    Juhani Karhumäki;Jeffrey Shallit

  • The Equivalence of Finite Valued Transducers (on HDTOL Languages) is Decidable

    Karel Culik;Juhani Karhumäki

  • ON THE UNDECIDABILITY OF FREENESS OF MATRIX SEMIGROUPS

    Julien Cassaigne;Tero Harju;Juhani Karhumäki

  • On a generalization of Abelian equivalence and complexity of infinite words

    Juhani Karhumaki;Aleksi Saarela;Luca Q. Zamboni

  • Toeplitz Words, Generalized Periodicity and Periodically Iterated Morphisms

    Julien Cassaigne;Juhani Karhumäki

  • Some Decision Problems Concerning Semilinearity and Commutation

    Tero Harju;Oscar H. Ibarra;Juhani Karhumäki;Arto Salomaa

  • A NOTE ON SYNCHRONIZED AUTOMATA AND ROAD COLORING PROBLEM

    Karel Culik;Juhani Karhumäki;Jarkko Kari

  • The commutation of finite sets: a challenging problem

    Christian Choffrut;Juhani Karhumaki;Nicolas Ollinger

  • Test sets for context free languages and algebraic systems of equations over a free monoid

    Jürgen Albert;Karel Culík;Juhani Karhumäki

  • Generalized Parikh Mappings and Homomorphisms

    Juhani Karhumäki

  • Some decision problems on integer matrices

    Christian Choffrut;Juhani Karhumäki

Frequent Co-Authors

Karel Culik
Karel Culik University of South Carolina
Grzegorz Rozenberg
Grzegorz Rozenberg Leiden University
Wojciech Rytter
Wojciech Rytter University of Warsaw
Arto Salomaa
Arto Salomaa Turku Centre for Computer Science
Oscar H. Ibarra
Oscar H. Ibarra University of California, Santa Barbara
Jan Willem Klop
Jan Willem Klop Vrije Universiteit Amsterdam
Andrzej Ehrenfeucht
Andrzej Ehrenfeucht University of Colorado Boulder
Hartmut Ehrig
Hartmut Ehrig Technical University of Berlin
Jeffrey Shallit
Jeffrey Shallit University of Waterloo
Donald Sannella
Donald Sannella University of Edinburgh

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