3 citations · 10 across the 19 of their papers we have counts for
4 papers · 1 filter
Irregular finite order solutions of complex LDE's in unit disc
Igor Chyzhykov, Petro Filevych, Janne Gröhn +2
It is shown that the order and the lower order of growth are equal for all non-trivial solutions of if and only if the coefficient is analytic in the unit disc…
Meromorphic functions of finite -order and linear -difference equations
Janne Heittokangas, Jun Wang, Zhi-Tao Wen +1
The -order was introduced in 2009 for meromorphic functions in the unit disc, and was used as a growth indicator for solutions of linear differential equations. In this paper, t…
Asymptotic integration theory for
Gary G. Gundersen, Janne Heittokangas, Amine Zemirni
Asymptotic integration theory gives a collection of results which provide a thorough description of the asymptotic growth and zero distribution of solutions of (*) ,…
On Petrenko's deviations and second order differential equations
J. Heittokangas, M. A. Zemirni
New results on the oscillation of solutions of and on the growth of solutions of are obtained, where and are entire functions. Petrenko's…