Value distribution of the product of a meromorphic function and its derivative

Further investigations on a question of Zhang and Lü

“…With the notion of weighted sharing of values Lahiri-Sarkar ( [8]) improved the result of Zhang ([13]). In ( [14]) Zhang extended the result of Lahiri-Sarkar ( [8]) and replaced the concept of value sharing by small function sharing.…”

Unique Range Set for Meromorphic Functions with Deficient Values

“…Since ( , ) = ( , ), it follows that and share (1, ). Hence using (20) and Lemmas 11, 12 and 13 we get from the second fundamental theorem for > 0 that …”

Some Results on the Questions of Kit-Wing Yu

“…Lemma 2.1 ( [7]). If N (r, 0; f (k) | f = 0) denotes the counting function of those zeros of f (k) which are not the zeros of f , where a zero of f (k) is counted according to its multiplicity, then…”