1989-1990/50/2

Existence, uniqueness and continuous dependence of solutions of differential equations in Banach space

The connection between number and form of bifurcation points and properties of the nonlinear perturbation of Berestycki type

On a characterization of ${\displaystyle L^p}$-norm

On some class of midconvex functions

Unitary dilation and fixed point theorem

Generalized solutions of mixed problems for quasilinear hyperbolic systems of functional partial differential equations in the Schauder canonic form

On the positivity of an invariant measure on open non-empty sets

Cosine families of unbounded normal operators

Asymptotic stability of dynamical systems with multiplicative perturbations

Bergman completeness of complete circular domains