Uniqueness of the polar factorisation and projection of a vector-valued mapping
Uniqueness Theorems for Measures in Lr and C0 (...).
Universal interpolating sequences on some function spaces
Let be the Hilbert space with reproducing kernel . This paper characterizes some sufficient conditions for a sequence to be a universal interpolating sequence for .
Universal series by trigonometric system in weighted spaces.
Universal zero solutions of linear partial differential operators
A generalized approach to several universality results is given by replacing holomorphic or harmonic functions by zero solutions of arbitrary linear partial differential operators. Instead of the approximation theorems of Runge and others, we use an approximation theorem of Hörmander.
Unordered Baire-like vector-valued function spaces.