to Continuum Mechanics - after Truesdell and Noll by DONALD R. SMITH University of California -San Diego, Department of Mathematics, La Jolla, U. S. A. SPRINGER-SCIENCE+BUSINESS MEDIA, B. V. Library ofCongress Cataloging-in-Publication Data Smlth. Dona ld R. An introductlon to continuum mechanlcs ! by Donald R. Smlth. p. cm. -- . 24 0. 4 Gradients of Principal Invariants ...32 38 0. 5 Chain Rules of Differentiation ...41 0. 6 Gradient of a Field ...45 0.