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Let F be a family of meromorphic functions on the plane domain D ,all of whose zeros have multiplicity at least k>=1 ,and if f(z)L(w(z)) = a <==>f(k)(z) = b for all f 2 F andz 2 D (where a 6= 0 and b are fixed complex numbers,L(w(z)) be a differential polynomial,m>=2 be a positive integer),then F is normal on D . |
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Keywords:normal family,meromophic function,shared value,differential polynomial. |
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