Contents Preface List of Symbols Chapter 1 Basic Properties of Complex Di.erences .....................1 Preliminaries ........................................................... 1
1.1 1.2 Di.erence Analogue of the Lemma on the Logarithmic Derivative.......5
1.3 Estimations of N (r, f (z +η)) ......................................... 11
1.4 Estimations of T (r, f (z +η))..........................................16
1.5 Di.erence Analogue of the Clunie Lemma..............................17
1.6 Di.erence Analogue of the Mohon’ko Lemma..........................19
1.7 Di.erence Analogue of the Second Main Theorem......................21
nf .......................................27
1.8 Characteristic Functions of Δ Chapter 2 Relationships Between Meromorphic Functions and Di.erences ................................................59 2.1 Relationships of f (z)and Δnf (z)......................................59
2.2 Fixed Points of f (z),f (z +c)and Δf (z)...............................66
Chapter 3 Di.erences of Meromorphic Functions with Small Growth .........................................................76 3.1 Divided Di.erences of Entire Functions of order < 1 ................... 76
3.2 Di.erences of Entire Functions of order : 1............................88
3.3 Di.erences of Meromorphic Functions..................................90
3.4 Second Di.erences of Meromorphic Functions with Small Growth.....100 Chapter 4 Properties of Di.erence Polynomials.......................115 4.1 Di.erence Analogues of f (z)nf '(z)....................................115
4.2 Di.erence Analogues of f '(z). af(z)n ................................128
4.3 Di.erence Analogue of the Tumura-Clunie Type Theorems............135 Chapter 5 Linear First Order Di.erence Equations ...................140
5.2 General Linear First Order Di.erence Equations......................153
5.3 Di.erences of Solutions for Di.erence Equations, and Di.erences of Γ(z)...............................................................160 Chapter 6 Linear Higher Order Di.erence Equations................173
6.1 Di.erence Equations with Rational Coe.cients ......................173
6.2 Di.erence Equations with Transcendental Coe.cients................182 Chapter 7 Basic Properties of Nonlinear Di.erence Equations ......186 7.1 Basic Properties Concerning Order Number...........................186
Chapter 11 Unicity of Meromorphic Functions Concerning Their Di.erences and Shifts .......................................323 11.1 Meromorphic Functions f (z) that Share Values with f (z +c)........323
11.2 Meromorphic Functions f (z) that Share Values with Δf (z)..........330
11.3 Meromorphic Functions f (z) that Share Values with Δf (z)and Δ2f (z).............................................................339 11.4 Meromorphic Functions f (z) that Share Values with Δnf (z).........343
Bibliography ................................................................357 Index ........................................................................368