On continuous convex or concave functions with respect to the logarithmic mean
On continuous preservation of norms and areas.
On Continuous Solutions of a Functional Equation.
On continuous solutions of a functional equation
This paper discusses continuous solutions of the functional equation φ[f(x)] = g(x,φ(x)) in topological spaces.
On continuous solutions of systems of functional equations
On continuous solutions of the Schröder equation
On convex and *-concave multifunctions
A continuous multifunction F:[a,b] → clb(Y) is *-concave if and only if the inclusion holds for every s,t ∈ [a,b], s < t.
On convex stochastic processes.
On convex triangle functions.
On convolution type functional equations.
On Costas sets and Costas clouds.
On curves invariant under an axial transform
On D'Alembert's functional equation on a Abelian group.
On Darboux solutions of the Euler's equation.
On derivations on certain function spaces and their relation to the differential operator. (Über Derivationen auf gewissen Funktionenräumen und deren Beziehung zum Differentiationsoperator.)
On diffeomorphic solutions of simultaneous Abel's equations
On differentiable solutions of some systems of functional equations of p-th order
On differentiable solutions of the functional equation φ(f(x)) = g(x, φ(x)) for vector-valued functions
On distribution functions of ξ(3/2)ⁿ mod 1
On Existance Of Expansion Of A Complex Function