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Jon Claerbout writes: ``The simplest and most fundamental
linear operators arise when a matrix operator reduces to a simple row
or column.'' A row is a summation operation and a column is an
impulse response. If the inner loop of a matrix-multiply ranges within
a row, the operator is called sum or pull.
If the inner loop ranges
within a column, the operator is called spray or push.
Next: Kirchhoff imaging and irregular
Up: DISCRETE KIRCHHOFF IMPLEMENTATIONS
Previous: True-amplitude imaging
Stanford Exploration Project
7/5/1998