• A Categorical approach to Tannaka Duality 

      Alsina Oriol, Guillem (Universitat Politècnica de Catalunya, 2016-07)
      Projecte Final de Màster Oficial
      Accés obert
      The aim of this work is to study, in a categorical context, similar results to the Tannaka-Krein duality theorem. We prove a reconstruction theorem which allows one to recover a given group G as the monoid of natural ...
    • Topological quantum field theories 

      Alsina Oriol, Guillem (Universitat Politècnica de Catalunya, 2015-05)
      Treball Final de Grau
      Accés obert
      The aim of this work is to explain what a topological quantum field theory (TQFT) is and the relation between TQFTs in dimension 2 and Frobenius algebras. More precisely, it is shown that there exists an equivalence of ...