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1.9781611973297.fm
f
(
x
)
⇔
decay of Fourier coefficients
f
k
. . . . . 169
B.5
Relations with shifts and derivatives . . . . . . . . . . . . . . . . . 170
B.6
Product-convolution relations . . . . . . . . . . . . . . . . . . . . . 171
B.7
Convolution on
n
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
B.8
Fourier transform (FT) . . . . . . . . . . . . . . . . . . . . . . . . . . 172
B.9
Properties of the FT . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173
B.10
FT of some common functions . . . . . . . . . . . . . . . . . . . . 174
B.11
The Paley–Wiener theorem . . . . . . . . . . . . . . . . . . . . . . . 174
B.12
Smoothness and decay of the FT . . . . . . . . . . . . . . . . . . . . 175
B.13
Smoothing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
B.14
Sobolev spaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176
Downloaded 11/25/23 to 84.54.70.76 . Redistribution subject to SIAM license or copyright; see https://epubs.siam.org/terms-privacy
xii
Contents
B.15
Sampling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
B.16
Mellin transform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179
B.17
Wavefront sets of distributions . . . . . . . . . . . . . . . . . . . . . 180
C
Geometric Rays, Trapping, Energy Decay
181
C.1
Geometric rays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181
C.2
Trapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
C.3
Local energy decay . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
D
Some Classes of Linear Operators and Operator Functions
183
D.1
Some notation concerning linear operators . . . . . . . . . . . . . 183
D.2
Fredholm and semi-Fredholm operators. Fredholm index. . . . 183
D.3
Schatten–von Neumann classes . . . . . . . . . . . . . . . . . . . . . 185
D.4
Regularized determinants . . . . . . . . . . . . . . . . . . . . . . . . 187
D.5
Analytic Fredholm operator functions . . . . . . . . . . . . . . . . 188
E
Recommended Books and Surveys
191
Bibliography
193
Index
237
Downloaded 11/25/23 to 84.54.70.76 . Redistribution subject to SIAM license or copyright; see https://epubs.siam.org/terms-privacy
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