J. Heittokangas: search on Z-Library

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1

Zero separation results for solutions of second order linear differential equations

Chuaqui, Martin, Gröhn, Janne, Heittokangas, Janne, Rättyä, Jouni

Journal:

Advances in Mathematics

Year:

2013

Language:

english

File:

PDF, 392 KB

english, 2013

2

Functions of finite logarithmic order in the unit disc, Part I

Heittokangas, Janne, Wen, Zhi-Tao

Journal:

Journal of Mathematical Analysis and Applications

Year:

2014

Language:

english

File:

PDF, 413 KB

english, 2014

3

Linear Differential Equations and Logarithmic Derivative Estimates The first and third authors were partially supported by INTAS, project 99-00089.

Chyzhykov, Igor, Gundersen, Gary G., Heittokangas, Janne

Journal:

Proceedings of the London Mathematical Society

Year:

2003

Language:

english

File:

PDF, 597 KB

english, 2003

4

Linear differential equations with coefficients in weighted Bergman and Hardy spaces

Heittokangas, Janne, Korhonen, Risto, Rättyä, Jouni

Journal:

Transactions of the American Mathematical Society

Year:

2008

Language:

english

File:

PDF, 259 KB

english, 2008

5

-Orders of Solutions of Linear Differential Equations in the Unit Disc

Chuaqui, Martin, Gröhn, Janne, Heittokangas, Janne, Rättyä, Jouni

Journal:

Abstract and Applied Analysis

Year:

2011

Language:

english

File:

PDF, 496 KB

english, 2011

6

Zero distribution of solutions of complex linear differential equations determines growth of coefficients

Janne Heittokangas, Jouni Rättyä

Journal:

Mathematische Nachrichten

Year:

2011

Language:

english

File:

PDF, 121 KB

english, 2011

7

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

J. Heittokangas, R. Korhonen, I. Laine, J. Rieppo, J. Zhang

Journal:

Journal of Mathematical Analysis and Applications

Year:

2009

Language:

english

File:

PDF, 224 KB

english, 2009

8

Fast Growing Solutions of Linear Differential Equations in the Unit Disc

Janne Heittokangas, Risto Korhonen, Jouni Rättyä

Journal:

Results in Mathematics

Year:

2006

Language:

english

File:

PDF, 197 KB

english, 2006

9

Exponential polynomials as solutions of certain nonlinear difference equations

Zhi Tao Wen, Janne Heittokangas, Ilpo Lain

Journal:

Acta Mathematica Sinica, English Series (Springer)

Year:

2012

Language:

english

File:

PDF, 226 KB

english, 2012

10

Complex Difference Equations of Malmquist Type

Janne Heittokangas, Risto Korhonen, Ilpo Laine…

Journal:

Computational Methods and Function Theory

Year:

2001

Language:

english

File:

PDF, 185 KB

english, 2001

11

Uniqueness of meromorphic functions sharing values with their shifts

Heittokangas, J., Korhonen, R., Laine, I., Rieppo, J.

Journal:

Complex Variables and Elliptic Equations

Year:

2011

Language:

english

File:

PDF, 151 KB

english, 2011

12

Functions of Finite Logarithmic Order in the Unit Disc, Part II

Heittokangas, Janne, Wen, Zhi-Tao

Journal:

Computational Methods and Function Theory

Year:

2015

Language:

english

File:

PDF, 291 KB

english, 2015

13

ON THE COMPLEXITY OF FINDING A NECESSARY AND SUFFICIENT CONDITION FOR BLASCHKE-OSCILLATORY EQUATIONS

HEITTOKANGAS, JANNE, REIJONEN, ATTE

Journal:

Glasgow Mathematical Journal

Year:

2015

Language:

english

File:

PDF, 103 KB

english, 2015

14

GENERALIZED LOGARITHMIC DERIVATIVE ESTIMATES OF GOL'DBERG–GRINSHTEIN TYPE

HEITTOKANGAS, J., KORHONEN, R., RÄTTYÄ, J.

Journal:

Bulletin of the London Mathematical Society

Year:

2004

Language:

english

File:

PDF, 148 KB

english, 2004

15

On α-Polynomial Regular Functions, with Applications to Ordinary Differential Equations

Fenton, Peter, Grohn, Janne, Heittokangas, Janne, Rossi, John, Rattya, Jouni

Journal:

Proceedings of the Edinburgh Mathematical Society

Year:

2014

Language:

english

File:

PDF, 212 KB

english, 2014

16

A unit disc analogue of the Bank-Laine conjecture does not hold

Heittokangas, Janne, Tohge, Kazuya

Journal:

Annales Academiae Scientiarum Fennicae Mathematica

Year:

2011

Language:

english

File:

PDF, 426 KB

english, 2011

17

Linear Differential Equations with Coefficients in Weighted Bergman and Hardy Spaces

Janne Heittokangas, Risto Korhonen and Jouni Rättyä

Journal:

Transactions of the American Mathematical Society

Year:

2008

Language:

english

File:

PDF, 1.41 MB

english, 2008

18

On the relationship between the lower order of coefficients and the growth of solutions of differential equations

Long, Jianren, Heittokangas, Janne, Ye, Zhuan

Journal:

Journal of Mathematical Analysis and Applications

Year:

2016

Language:

english

File:

PDF, 824 KB

english, 2016

19

Growth estimates for logarithmic derivatives of Blaschke products and of functions in the Nevanlinna class

Heittokangas, Janne

Journal:

Kodai Mathematical Journal

Year:

2007

Language:

english

File:

PDF, 133 KB

english, 2007

20

Dual exponential polynomials and linear differential equations

Wen, Zhi-Tao, Gundersen, Gary G., Heittokangas, Janne

Journal:

Journal of Differential Equations

Year:

2017

Language:

english

File:

PDF, 707 KB

english, 2017

21

Zero distribution and division results for exponential polynomials

Heittokangas, Janne, Ishizaki, Katsuya, Tohge, Kazuya, Wen, Zhi-Tao

Journal:

Israel Journal of Mathematics

Year:

2018

Language:

english

File:

PDF, 303 KB

english, 2018

22

Complex oscillation and nonoscillation results

Heittokangas, Janne, Ishizaki, Katsuya, Laine, Ilpo, Tohge, Kazuya

Journal:

Transactions of the American Mathematical Society

Year:

2019

Language:

english

File:

PDF, 334 KB

english, 2019

23

Deficient Values of Solutions of Linear Differential Equations

Gundersen, Gary G., Heittokangas, Janne, Wen, Zhi-Tao

Journal:

Computational Methods and Function Theory

Year:

2020

File:

PDF, 473 KB

2020

24

Blaschke-oscillatory equations of the form

Janne Heittokangas

Journal:

Journal of Mathematical Analysis and Applications

Year:

2006

Language:

english

File:

PDF, 139 KB

english, 2006

25

Meromorphic solutions of generalized Schröder equations

G. G. Gundersen, J. Heittokangas, I. Laine, J. Rieppo, D. Yang

Journal:

Aequationes Mathematicae

Year:

2002

Language:

english

File:

PDF, 306 KB

english, 2002

26

On Interpolating Blaschke Products and

Janne Heittokangas

Journal:

Constructive Approximation

Year:

2011

Language:

english

File:

PDF, 675 KB

english, 2011

27

Finiteness of φ-order of solutions of linear differential equations in the unit disc

I. Chyzhykov, J. Heittokangas, J. Rättyä

Journal:

Journal d'Analyse Mathématique

Year:

2009

Language:

english

File:

PDF, 695 KB

english, 2009

28

Meromorphic solutions of some linear functional equations

J. Heittokangas, I. Laine, J. Rieppo, D. Yang

Journal:

Aequationes Mathematicae

Year:

2000

Language:

english

File:

PDF, 402 KB

english, 2000

29

New Findings on the Bank–Sauer Approach in Oscillation Theory

Janne Gröhn, Janne Heittokangas

Journal:

Constructive Approximation

Year:

2012

Language:

english

File:

PDF, 599 KB

english, 2012

30

Solutions off″ +A(z)f= 0 in the Unit Disc Having Blaschke Sequences as the Zeros

Janne Heittokangas

Journal:

Computational Methods and Function Theory

Year:

2005

Language:

english

File:

PDF, 197 KB

english, 2005

31

SHARP LOGARITHMIC DERIVATIVE ESTIMATES WITH APPLICATIONS TO ORDINARY DIFFERENTIAL EQUATIONS IN THE UNIT DISC

CHYZHYKOV, I., HEITTOKANGAS, J., RÄTTYÄ, J.

Journal:

Journal of the Australian Mathematical Society

Year:

2010

Language:

english

File:

PDF, 259 KB

english, 2010

32

On meromorphic solutions of certain nonlinear differential equations

Heittokangas, J., Korhonen, R., Laine, I.

Journal:

Bulletin of the Australian Mathematical Society

Year:

2002

Language:

english

File:

PDF, 435 KB

english, 2002

33

on the Complexity of Finding a Necessary and Sufficient Condition for Blaschke-Oscillatory Equations

Heittokangas, Janne, Reijonen, Atte

Year:

2014

Language:

english

File:

PDF, 103 KB

english, 2014

34

Linear Differential Equations with Solutions in the Dirichlet Type Subspace of the Hardy Space

Heittokangas, J., Korhonen, R., Rättyä, J.

Journal:

Nagoya Mathematical Journal

Year:

2007

Language:

english

File:

PDF, 222 KB

english, 2007

35

On the number of linearly independent admissible solutions to linear differential and linear difference equations

Heittokangas, Janne, Yu, Hui, Zemirni, Mohamed Amine

Journal:

Canadian Journal of Mathematics

Year:

2020

File:

PDF, 888 KB

2020

36

Generalization of PÃ³lyaâs Zero Distribution Theory for Exponential Polynomials, and Sharp Results for Asymptotic Growth

Heittokangas, Janne M., Wen, Zhi-Tao

Journal:

Computational Methods and Function Theory

Year:

2020

File:

PDF, 506 KB

2020

37

Exponential polynomials in the oscillation theory

Heittokangas, Janne, Ishizaki, Katsuya, Laine, Ilpo, Tohge, Kazuya

Journal:

Journal of Differential Equations

Year:

2021

File:

PDF, 406 KB

2021