On relations among metric derived numbers
On results of Jan Mařík in the theory of derivatives
Results of Jan Marik on the theory of derivatives of real functions are described.
On some properties of J-convex stochastic processes.
On some properties of symmetric derivatives
On symmetric derivatives and on properties of Zahorski
On the asymptotics of mean value points for some finite-difference operators.
On the Boundary Derivative for Univalent Functions.
On the derivative of indefinite RC-integral
On the equation
On the existence of functions with perfect level sets.
On the first derivative of real functions (Preliminary communication)
On the functional equation f(...(x) + g(y)) = ..(x) * h(x+y). (Short Communication).
On the functional equation f(...(x) + g(y)) = ...(x) * h(x+y).
On the intersection of the sets of the right and left internal approximate derivatives
On the k-pseudo-symmetrical approximate differentiability
On the product of derivatives
On the product of derivatives
On the quasiarithmetic mean in a mean value property and the associated functional equation.
On the set where an approximate derivative is a derivative
On the symmetry of approximate Dini derivates of arbitrary functions