Unicity theorems for meromorphic functions that share three values

Let / and g be two nonconstant meromorphic functions in the complex plane. If / and g have the same β-points with the same multiplicities, we say / and g share the value a CM. (see [1]). It is assumed that the reader is familiar with the basic notations and fundamental results of Nevanlinna's theory of meromorphic functions, as found in [2]. It will be convenient to let E denote any set of positive real numbers of finite linear measure, not necessarily the same at each occurrence. The notation S(r, f) denotes any quantity satisfying