A note on Hayman’s problem and the sharing value

A note on Hayman’s problem and the sharing value
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DOI:
10.3792/pjaa.90.119
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发表时间:
2014-08
期刊:
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影响因子:
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通讯作者:
Yuntong Li
Yuntong Li
中科院分区:
其他
文献类型:
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作者:
Yuntong Li

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设f是非常数亚纯函数,n,k是两个正整数.假设f n和f n k的值相同a 6 <$0; 1 CM。如果(1)n > k 2,或(2)n > k 1且(cid:2)N r; f(cid:2)T r; f(cid:2)2 ½ 0 ; 12,则f n f n k和f采用形式f z ce(cid:2)n z,其中c是非零常数且(cid:2)k 1。
: Let f be a nonconstant meromorphic functions, n; k be two positive integers. Suppose that f n and ð f n Þ ð k Þ share the value a ð6¼ 0 ; 1Þ CM. If either (1) n > k þ 2 , or (2) n > k þ 1 and (cid:2) N ð r; f Þ ¼ (cid:2)T ð r; f Þð (cid:2) 2 ½ 0 ; 12 ÞÞ , then f n ¼ ð f n Þ ð k Þ and f assumes the form f ð z Þ ¼ ce (cid:2)n z where c is a nonzero constant and (cid:2) k ¼ 1 .