Meromorphe Funktionen mit geteilten Grenzwerten
This habilitation thesis is concerned with the behaviour of meromorphic functions in the plane in the neighbourhood of infinity. We say that two functions share limit values, if both functions converge to certain given values on the same sequences to infinity. Shared limit values lead to shared islands in a suitable sense, which makes it possible to apply Ahlfors's theory of covering surfaces. For example, we proof a (weak)analogue of Nevanlinna's theorem on five shared values. In the second chapter deficient rational functions and zeros of composite meromorphic functions are studied.