INDEX 431
transition matrices, 340
version, 162
wave equation, 281
damped, 2, 7, 109–117
wavefront set
classical, 190
for operators, 194
semiclassical, 188, 191, 192, 196
using FBI transform, 323
wedge product, 391
weight, 145
Weyl’s Law, 7, 132–137, 370
for harmonic oscillator, 123
on manifolds, 361–362
WKB approximation, xii, 227, 228,
273–274
Young’s inequality, 160
