Some Problemes Of Normal Families Concerning Meromorphic Functions

This thesis studies the normal families and value distribution of meromorphic functions by using Nevanlinna's value distribution. With regard to normal families of meromorphic functions, the author studies the normal families of meromorphic functions concerning differentional polynomials,therefore we improved the results of Gu Y.X.and Wang Y.F., separately we studies the normality and shared-value, the author improved the results of Chen huaihui and Fang M.L.With regard to value distribution, the author improved the the results of Hayman and Wang Y.F.