Epilogue

A couple years later, while revising PVI which had gone out of print, Professor Claerbout notices that equation (3) is an oversimplification. Actually, all the quantities in it should be partitioned matrices. He tries in vain to convince the SEP students to update Dr. Mucho Moola's approximation (4) and apply it routinely using C++. Professor Wily Dymes at Rice University in Houston figures this out independently, however, and as a consequence SEP funding declines rapidly. Claerbout retires to putter with earthquake seismograms and all the SEP students have to move to Houston to complete their degrees.