Janne Heittokangas

Value sharing results for shifts of meromorphic functions, and sufficient conditions for periodicity

Janne Heittokangas, Risto Korhonen, Ilpo Laine et al. · Journal of Mathematical Analysis and Applications · 2009 · 185 citations

Meromorphic Functions, Riemann-hilbert Problem, Sufficient Conditions +4

Complex Difference Equations of Malmquist Type

Janne Heittokangas, Risto Korhonen, Ilpo Laine et al. · Computational Methods and Function Theory · 2001 · 123 citations

Oscillation Theory, Complex Difference Equations, Integrable System

Uniqueness of meromorphic functions sharing values with their shifts

Janne Heittokangas, Risto Korhonen, Ilpo Laine et al. · Complex Variables and Elliptic Equations · 2010 · 116 citations

Meromorphic Functions, Shared Value Problems, Analytic Number Theory +7

Linear Differential Equations and Logarithmic Derivative Estimates

Igor Chyzhykov, Gary G. Gundersen, Janne Heittokangas · Proceedings of the London Mathematical Society · 2003 · 92 citations

Sharp Inequalities, Riemann-hilbert Problem, Linear Differential Equations +5

GROWTH ESTIMATES FOR SOLUTIONS OF LINEAR COMPLEX DIFFERENTIAL EQUATIONS

Janne Heittokangas, Risto Korhonen, Jouni Rättyä · 2004 · 72 citations