A canonical form for a system of quadratic functional equations
A characterization of Cauchy kernels.
A characterization of convolution and related operations.
A characterization of damped and undamped harmonic oscillations by a superposition property II.
A characterization of derivations by functional equations.
A characterization of Gaussian law in Hilbert space.
A characterization of generalized inner product spaces (?-orthogonally additive mappings, III).
A class of symmetric biadditive functionals.
A conditional dilation equation.
A conditional dilation equation. (Summary).
A contribution to a theorem of Ulam and Mazur.
A Cosine Functional Equation with Restricted Argument. (Short Communication).
A family of symmetric biadditive nonbilinear functions.
A few remarks on almost -polynomial functions
A few remarks on automorphic functions.
A fixed point approach to the fuzzy stability of an additive-quadratic-cubic functional equation.
A fixed point approach to the stability of a functional equation of the spiral of Theodorus.
A fixed point approach to the stability of a general mixed AQCQ-functional equation in non-Archimedean normed spaces.
A fixed point approach to the stability of a generalized Cauchy functional equation.
A fixed point approach to the stability of a quadratic functional equation in -algebras.