We begin with a brief review of wavefield extrapolation,
followed by a discussion of image transformations to the
optimization domain, the objective functions and their gradient
with respect to velocity. In the end, we restate our main results
in the familiar SEP notation using linear fitting goals.

- Imaging by wavefield extrapolation
- Wavefield perturbations
- Image transformation
- Objective function
- Gradient
- Linearization

11/11/2002