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math.RA2025
Galois Rings: Ring-Theoretic Properties and Applications to Coulomb Branches and Affine Hecke Algebras
Vyacheslav Futorny, Jonas T. Hartwig, Erich C. Jauch +1
Galois rings and Galois orders, introduced by Futorny and Ovsienko, are realized as subrings of fixed subrings of skew group (or monoid) rings and have numerous applications in the…
math.CT2025
A note on the definition of derived functors
João Schwarz
The purpose of this note is to consider in detail the construction of derived functors. The classical construction, such as in Cartan-Eilenberg or Grothendieck, is clarified, and i…