Shared Values And Uniqueness Of Meromorphic Functions

The uniqueness theory of meromorphic functions is an important subject in value distribution theory.Many mathematicians such as E.Mues,F.Gross,G.G.Gundersen,G.Frank,N.Steinmrtz, I.Lahiri,W.Bergweiler ,Jank-Wolkmann,H.Ueda,C.C.Yang,Q.L. Xiong,L.Yang,H.X.Yi and Y.X.Gu had done a lot of work on the reaserch of the uniqueness theory.In this paper, by using the Nevanlinna's value distribution theory,we study the uniqueness of meromorphic functions.And using the idea of weighed sharing , deal with the uniqueness problems on entire functions with its k-th differential polynomials and the uniqueness problems on some certain types of meromorphic functions differential polynomials.And obtained some results,which perfect and generalize the present conclusions.