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Excerpt from On Curve Matching Work on this paper has been supported by Office of Naval Research Grant nogo14-82-k-0381, Nation al Science Foundation Grant No. Nsf-dcr-83-20085, and by grants from the Digital Equipment Cor potation, and the ibm Corporation. 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.