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Preface xi
Acknowledgments xiii
Introduction 1
Open-source software 1
Calling up a program 2
Log files and print files 3
More on log files 4
The tilde notation for printed answers 5
Computer Arithmetics 9
Floating-point arithmetic 9
Variable precision floating-point arithmetic 10
Interval arithmetic 11
Range arithmetic 13
Practical range arithmetic 15
Interval arithmetic notation 15
Computing standard functions in range arithmetic 17
Rational arithmetic 18
Software Exercises A 20
Notes and References 23
Classification of Numerical Computation Problems 25
A knotty problem 25
The impossibility of untying the knot 27
Repercussions from nonsolvable problem 3.1 27
Some solvable and nonsolvable decimal place problems 29
The solvable problems handled by calc 32
Another nonsolvable problem 32
The trouble with discontinuous functions 33
Notes andReferences 35
Real-Valued Functions 37
Elementary functions 37
Software Exercises B 39
Computing Derivatives 41
Power series of elementary functions 41
An example of series evaluation 48
Power series for elementary functions of several variables 49
A more general method of generating power series 52
The demo program deriv 54
Software Exercises C 54
Notes and References 54
Computing Integrals 57
Computing a definite integral 57
Formal interval arithmetic 59
The demo program integ for computing ordinary definite integrals 61
Taylor's remainder formula generalized 63
The demo program mulint for higher dimensional integrals 64
The demo program impint for computing improper integrals 66
Software Exercises D 67
Notes and References 68
Finding Where a Function f(x) is Zero 69
Obtaining a solvable problem 69
Using interval arithmetic for the problem 72
Newton's method 73
Order of convergence 75
Software Exercises E 77
Finding Roots of Polynomials 79
Polynomials 79
A bound for the roots of a polynomial 85
The Bairstow method for finding roots of a real polynomial 86
Bounding the error of a rational polynomial's root approximations 90
Finding accurate roots for a rational or a real polynomial 92
The demo program roots 95
Software Exercises F 95
Notes and References 96
Solving n Linear Equations in n Unknowns 97
Notation 97
Computation problems 98
A method for solving linear equations 100
Computing determinants 102
Finding the inverse of a square matrix 104
The demo programs equat, r_equat, and c_equat 105
Software Exercises G 106
Notes and References 107
Eigenvalue and Eigenvector Problems 109
Finding a solution to Ax = 0 when det A = 0 110
Eigenvalues and eigenvectors 113
Companion matrices and Vandermonde matrices 118
Finding eigenvalues and eigenvectors by Danilevsky's method 122
Error bounds for Danilevsky's method 127
Rational matrices 134
The demo programs eigen, c_eigen, and r_eigen 135
Software Exercises H 136
Problems of Linear Programming 137
Linear algebra using rational arithmetic 137
A more efficient method for solving rational linear equations 140
Introduction to linear programming 141
Making the simplex process foolproof 145
Solving n linear interval equations in n unknowns 148
Solving linear interval equations via linear programming 152
The program linpro for linear programming problems 155
The program i_equat for interval linear equations 156
Software Exercises I 156
Notes and References 157
Finding Where Several Functions are Zero 159
The general problem for real elementary functions 159
Finding a suitable solvable problem 160
Extending the f(x) solution method to the general problem 163
The crossing parity 165
The crossing number and the topological degree 166
Properties of the crossing number 170
Computation of the crossing number 171
Newton's method for the general problem 175
Searching a more general region for zeros 176
Software Exercises J 178
Notes and References 180
Optimization Problems 181
Finding a function's extreme values 181
Finding where a function's gradient is zero 184
The demo program extrema 188
Software Exercises K 188
Notes and References 189
Ordinary Differential Equations 191
Introduction 191
Two standard problems of ordinary differential equations 193
Difficulties with the initial value problem 196
Linear differential equations 197
Solving the initial value problem by power series 198
Degree 1 interval arithmetic 201
An improved global error 205
Solvable two-point boundary-value problems 208
Solving the boundary-value problem by power series 210
The linear boundary-value problem 213
Software Exercises L 214
Notes and References 216
Partial Differential Equations 217
Partial differential equation terminology 217
ODE and PDE initial value problems 219
A power series method for the ODE problem 220
The first PDE solution method 223
A simple PDE problem as an example 227
A defect of the first PDE method 228
The revised PDE method with comparison computation 229
Higher dimensional spaces 230
Satisfying boundary conditions 231
Software Exercises M 232
Notes and References 233
Numerical Methods with Complex Functions 235
Elementary complex functions 235
The demo program c_deriv 237
Computing line integrals in the complex plane 237
Computing the roots of a complex polynomial 238
Finding a zero of an elementary complex function f(z) 239
The general zero problem for elementary complex functions 242
Software Exercises N 245
Notes and References 247
The Precise Numerical Methods Program PNM 248
Index 249
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