Excerpt from Asymptotic Evaluation of the Field at a Caustic The last statement must be qualified in two respects. First, the form (5) applies only at points not on caustics or shadow boundaries. Second. The leading term will be a sum of expressions of the type given in (5) About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.