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  • Bài báo/Newspaper

  • Hoang Xuan Sinh's thesis: Categorifying Group Theory

    • Authors: John C. Baez (2023)

  • During what Vietnamese call the American War, Alexander Grothendieck spent three weeks teaching mathematics in and near Hanoi. Hoàng Xuân Sính took notes on his lectures and later did her thesis work with him by correspondence. In her thesis she developed the theory of ‘Gr-categories’, which are monoidal categories in which all objects and morphisms have inverses. Now often called ‘2-groups’, these structures allow the study of symmetries that themselves have symmetries. After a brief account of how Hoàng Xuân Sính wrote her thesis, we explain some of its main results, and its context in the history of mathematics
  • Bài báo/Newspaper

  • Truncated second main theorem for non-Archimedean meromorphic maps

    • Authors: Si Duc Quang (2023)

  • Let F be an algebraically closed field of characteristic p ≥ 0, which is complete with respect to a non-Archimedean absolute value. Let V be a projective subvariety of P M(F). In this paper, we will prove some second main theorems for non-Archimedean meromorphic maps of Fm into V intersecting a family of hypersurfaces in N−subgeneral position with truncated counting functions.
  • Bài báo/Newspaper

  • On Korenblum constants for some weighted function spaces

    • Authors: Wee JunJie (2023)

  • The Korenblum Maximum Principle is an important open problem in complex analysis as it acts as one of the fundamental properties of complex function spaces that remains unsolved. First conjectured in 1991, the principle was introduced [15] by Boris Korenblum for the classical Bergman space A2 (D) in the following way