PT EN

Categories in Algebra and Topology

Program

Part I: Introduction to Category Theory:
Categories, functors and natural transformations. Isomorphism and equivalence of categories. Construction of new categories: subcategories, product of categories and dual category. Categorical duality principle. Limits and colimits. Functor categories. Representable functors. Yoneda Lemma and Yoneda embedding. Adjoints and limits. Existence of adjoints (Freyd's Theorem).

Part II: It includes topics from the list below, chosen according to the interests of the students:
Monads and categories of Eilenberg-Moore algebras. Cartesian closed categories. Toposes. Locales. Exact and regular categories. Additive, abelian, semi-abelian categories and homological categories.

Research and Events

Events

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Defended Theses

  • Numerical semigroups: a conjecture of Wilf and related topics
      Neeraj Kumar (July 2025)
      Manuel Delgado
      Claude Marion
  • Dynamics of vector fields with univalued solutions
      Laura Rosales Ortiz (June 2025)
      Helena Reis
      Júlio Rebelo (Université Toulouse III)
  • Regular transitions of physical measures in nonuniformly hyperbolic systems
      Odaudu Reuben Etubi (April 2025)
      José Ferreira Alves
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