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Continued Fractions - Vol 1: Convergence Theory (2nd Edition) 2nd Revised edition [Kõva köide]

(Norwegian Univ Of Science & Technology, Norway), (Norwegian Univ Of Science & Technology, Norway)
Teised raamatud teemal:
Teised raamatud teemal:
Continued Fractions consists of two volumes — Volume 1: Convergence Theory; and Volume 2: Representation of Functions (tentative title), which is expected in 2011. Volume 1 is dedicated to the convergence and computation of continued fractions, while Volume 2 will treat representations of meromorphic functions by continued fractions. Taken together, the two volumes will present the basic continued fractions theory without requiring too much previous knowledge; some basic knowledge of complex functions will suffice. Both new and advanced graduate students of continued fractions shall get a comprehensive understanding of how these infinite structures work in a number of applications, and why they work so well. A varied buffet of possible applications to whet the appetite is presented first, before the more basic but modernized theory is given.This new edition is the result of an increasing interest in computing special functions by means of continued fractions. The methods described in detail are, in many cases, very simple, yet reliable and efficient.
Preface to the Second edition v
Preface vi
Introductory examples
1(52)
Basic Concepts
2(12)
Prelude to a definition
2(3)
Definitions
5(5)
Computation of approximants
10(1)
Approximating the value of K(an/bn)
11(3)
Regular continued fractions
14(11)
Introduction
14(3)
Best rational approximation
17(4)
Solving linear diophantine equations
21(1)
Grandfather clocks
22(1)
Musical scales
23(2)
Rational approximation to functions
25(5)
Expansions of functions
25(2)
Hypergeometric functions
27(3)
Correspondence between power series and continued fractions
30(8)
From power series to continued fractions
30(3)
From continued fractions to power series
33(1)
One fractio, two series; analytic continuation
33(2)
Pade approximation
35(3)
More examples of applications
38(8)
A differential equation
38(1)
Moment problems and divergent series
39(3)
Orthogonal polynomials
42(1)
Thiele interpolation
43(2)
Stable polynomials
45(1)
Remarks
46(2)
Problems
48(5)
Basics
53(46)
Convergence
54(23)
Properties of linear fractional transformations
54(5)
Convergence of continued fractions
59(1)
Restrained sequences
60(3)
Tail sequences
63(2)
Tail sequences and three term recurrence relations
65(5)
Value sets
70(3)
Element sets
73(4)
Transformations of continued fractions
77(12)
Introduction
77(1)
Equivalence transformations
77(5)
The Bauer-Muir transformation
82(3)
Contractions and extensions
85(2)
Contractions and convergence
87(2)
Remarks
89(2)
Problems
91(8)
Convergence criteria
99(72)
Tools
100(16)
The Stern-Stolz Divergence Theorem
100(3)
The Lane-Wall Characterization
103(3)
Truncation error bounds
106(2)
Mapping with linear fractional transformations
108(6)
The Stieltjes-Vitali Theorem
114(1)
A simple estimate
115(1)
Classical convergence theorems
116(44)
Positive continued fractions
116(6)
Alternating continued fractions
122(2)
Stieltjes continued fractions
124(5)
The Sleszynski-Pringsheim Theorem
129(6)
Worpitzky's Theorem
135(7)
Van Vleck's Theorem
142(6)
The Thron-Lange Theorem
148(3)
The parabola theorems
151(9)
Additional convergence theorems
160(5)
Simple bounded circular value sets
160(3)
Simple unbounded circular value sets
163(2)
Remarks
165(1)
Problems
166(5)
Periodic and limit periodic continud fractions
171(46)
Periodic continued fractions
172(14)
Introduction
172(1)
Iterations of linear fractional transformations
172(2)
Classification of linear fractional tranformations
174(2)
General convergence of periodic continued fractions
176(3)
Convergence in the classical sense
179(2)
Approximants on closed form
181(2)
A connection to the Parabola Theorem
183(3)
Limit periodic continued fractions
186(17)
Definition
186(1)
Finite limits, loxodromic case
187(5)
Finite limits, parabolic case
192(4)
Finite limits, elliptic case
196(4)
Infinite limits
200(3)
Continued fractions with multiple limits
203(2)
Periodic continued fractions with multiple limits
203(1)
Limit periodic continued fractions with multiple limits
204(1)
Fixed circles
205(6)
Introduction
205(1)
Fixed circles for T E M
205(2)
Fixed circles and periodic continued fractions
207(4)
Remarks
211(1)
Problems
212(5)
Numerical computation of continued fractions
217(48)
Choice of approximants
218(20)
Fast convergence
218(1)
The fixed point method
219(4)
auxiliary continued fractions
223(4)
The improvement machine for the loxodromic case
227(5)
Asymptotic expansion of tail values
232(3)
The square root modification
235(3)
Truncation error bounds
238(22)
The ideas
238(2)
Truncation error bounds
240(3)
The Oval Sequence Theorem
243(1)
An algorithm to find value sets for a given continued fractions of form K (an/1)
244(4)
Value sets and the fixed point method
248(7)
Value sets B(wnPn) for limit 1-periodic continued fractions of loxodromic or parabolic type
255(3)
Error bounds based on idea 3
258(2)
Stable computation of approximants
260(1)
Stability of the backward recurrence algorithm
260(1)
Remarks
261(1)
Problems
262(3)
Some continued fraction expansions
265(30)
Introduction
265(1)
Notation
265(1)
Transformations
266(1)
Elementary functions
266(9)
Mathematical constants
266(2)
The exponential function
268(1)
The general binomial function
269(1)
The natural logarithm
270(2)
Trigonometric and hyperbolic functions
272(1)
Inverse trigonometric and hyperbolic functions
273(1)
Continued fractions with simple values
274(1)
Hypergeometric functions
275(16)
General expressions
275(2)
Special examples with oF1
277(1)
Special examples with 2F0
277(4)
Special examples with 1F1
281(1)
Special examples with 2F1
281(1)
Some integrals
282(2)
Gamma function expressions
284(7)
Ramanujan
Basic hypergeometric functions
291(4)
General expressions
291(1)
Two general results
292(1)
Andrews
q-expressions
292(3)
Ramanujan
Bibliography 295(11)
Index 306