New estimates for meromorphic functions | Zendy

Bülent Nafi Örnek | Zendy

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New estimates for meromorphic functions

Author(s) -

Bülent Nafi Örnek

Publication year - 2021

Publication title -

publications de l institut mathematique

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.246

H-Index - 17

eISSN - 1820-7405

pISSN - 0350-1302

DOI - 10.2298/pim2123153o

Subject(s) - meromorphic function , boundary (topology) , mathematics , class (philosophy) , lemma (botany) , function (biology) , mathematical analysis , modulus , point (geometry) , pure mathematics , unit (ring theory) , geometry , computer science , ecology , poaceae , artificial intelligence , evolutionary biology , biology , mathematics education

A boundary version of the Schwarz lemma for meromorphic functions is investigated. For the function Inf(z) = 1/z +?? k=2 knck?2zk?2, belonging to the class of W, we estimate from below the modulus of the angular derivative of the function on the boundary point of the unit disc.

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