World's Best Scientists 2026 revealed!

D-Index & Metrics

Mathematics

D-Index
37
Citations
5568
World Ranking
2511
National Ranking
19

Research.com Recognitions

  • 2008 - Fellow, The World Academy of Sciences

Overview

Ruy Exel is affiliated with the Universidade Federal de Santa Catarina in Brazil, working primarily in the fields of Mathematics and Computer Science. Their research spans several specialized subfields including Mathematical Physics, Algebra and Number Theory, Computational Theory and Mathematics, Geometry and Topology, and Applied Mathematics.

The scientist's research topics cover various advanced aspects of algebra and operator theory, such as:

  • Advanced Operator Algebra Research
  • Advanced Topics in Algebra
  • Semigroups and Automata Theory
  • Advanced Algebra and Logic
  • Holomorphic and Operator Theory
  • Algebraic Structures and Combinatorial Models
  • Advanced Banach Space Theory

Their publication record includes contributions to a range of journals and venues, with frequent publications in:

  • arXiv (Cornell University)
  • Proceedings of the American Mathematical Society Series B
  • Proceedings of the American Mathematical Society
  • Bulletin of the London Mathematical Society
  • Semigroup Forum

Recent papers of Ruy Exel and collaborators are:

  • Exotic ideals in free transformation group C∗$C$-algebras, 2023, Bulletin of the London Mathematical Society
  • A remark on contracting inverse semigroups, 2023, Semigroup Forum
  • Corrigendum to "intermediate C*-algebras of Cartan embeddings", 2024, Proceedings of the American Mathematical Society Series B
  • Intermediate C*-algebras of Cartan embeddings, 2021, Proceedings of the American Mathematical Society Series B
  • Entropy for partial actions of ℤ, 2021, Proceedings of the American Mathematical Society

Frequent coauthors who have collaborated with Ruy Exel include:

  • David R. Pitts
  • Jonathan H. Brown
  • Adam H. Fuller
  • Sarah Reznikoff
  • Vrej Zarikian

The scientist has also contributed to academic book publications, with one notable title:

  • Characterizing Groupoid C*-algebras of Non-Hausdorff Étale Groupoids, published by Springer Nature in 2022

Among awards, Ruy Exel was recognized as a Fellow of The World Academy of Sciences in 2008.

Best Publications

  • Associativity of crossed products by partial actions, enveloping actions and partial representations

    M. Dokuchaev;Ruy Exel

  • Circle actions on C*-algebras, partial automorphisms, and a generalized Pimsner-Voiculescu exact sequence

    R. Exel

  • Inverse semigroups and combinatorial C*-algebras

    Ruy Exel

  • Partial actions of groups and actions of inverse semigroups

    Ruy Exel;Ruy Exel

  • Cuntz-Krieger algebras for infinite matrices

    R. Exel;M. Laca

  • Amenability for Fell bundles.

    Ruy Exel

  • Partial Dynamical Systems, Fell Bundles and Applications

    Ruy Exel

  • Twisted Partial Actions: A Classification of Regular C*-Algebraic Bundles

    R Exel

  • A new look at the crossed-product of a C^*-algebra by an endomorphism

    Ruy Exel

  • Morita equivalence for crossed products by Hilbert $C^st$-bimodules

    Beatriz Abadie;Beatriz Abadie;Søren Eilers;Ruy Exel

  • PARTIAL DYNAMICAL SYSTEMS AND C -ALGEBRAS GENERATED BY PARTIAL ISOMETRIES

    Ruy Exel;Marcelo Laca;John Quigg

  • Partial Representations and Partial Group Algebras

    Michael Dokuchaev;Ruy Exel;Paolo Piccione

  • C -Algebras of Irreversible Dynamical Systems

    R. Exel;A. Vershik

  • Invariants of almost commuting unitaries

    Ruy Exel;Terry A Loring

  • Reconstructing a totally disconnected groupoid from its ample semigroup

    Ruy Exel

  • FINITE-DIMENSIONAL REPRESENTATIONS OF FREE PRODUCT C*-ALGEBRAS

    Ruy Exel;Terry A. Loring

  • Partial Dynamical Systems and the KMS Condition

    Ruy Exel;Marcelo Laca

  • Dynamical systems associated to separated graphs, graph algebras, and paradoxical decompositions☆

    Pere Ara;Ruy Exel

  • Maximal Subdiagonal Algebras

    Ruy Exel

  • The soft torus and applications to almost commuting matrices

    Ruy Exel

  • Self-similar graphs, a unified treatment of Katsura and Nekrashevych C*-algebras

    Ruy Exel;Enrique Pardo

Frequent Co-Authors

Anatoly Vershik
Anatoly Vershik Saint Petersburg State University
Aidan Sims
Aidan Sims University of New South Wales
Ken Dykema
Ken Dykema Texas A&M University
George A. Elliott
George A. Elliott University of Toronto

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