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On the complex oscillation theory of f ″ + A ( z ) f = 0 where A ( z ) is analytic in the unit disc
Author(s) -
Cao TingBin,
Yi HongXun
Publication year - 2009
Publication title -
mathematische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 50
eISSN - 1522-2616
pISSN - 0025-584X
DOI - 10.1002/mana.200610774
Subject(s) - mathematics , oscillation (cell signaling) , unit (ring theory) , order (exchange) , mathematical analysis , oscillation theory , mathematical physics , analytic function , differential (mechanical device) , differential equation , linear differential equation , physics , thermodynamics , chemistry , mathematics education , biochemistry , exact differential equation , finance , economics
In this paper, we investigate the complex oscillation theory of the second order linear differential equation f ″ + A ( z ) f = 0, where the coefficient A ( z ) is an analytic function in the unit disc Δ = { z : | z | < 1} (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)