Normality and Shared Values

In this paper,the authors draw a connection between normal family and sharing values.They obtain the following normal criterions:Let F be a family of meromorphic functions defined in a domain D,a,b∈c,a,b≠1,.If f∈F,f and f'share the value 1 in D,f=a ■ f'=b,then F is normal in D.Let F be a family of holomorphic functions defined in a domain D,k∈N+,b∈R+,.If f∈F,the zeros f-1 are of multiplicity ≥k,f=1 ■ f(k)=1,f(k)=1 ■ 0|f(k+1)|≤b,Then F is normal in D.