All Stories

  1. Hyers-Ulam stability of quadratic operators in locally convex cones
  2. Additive and Fréchet functional equations on restricted domains with some characterizations of inner product spaces
  3. On a functional equation that has the quadratic-multiplicative property
  4. Modular frames and invertibility of multipliers in Hilbert C*-modules
  5. On the stability of a Cauchy type functional equation