Tristan Needham is professor of mathematics at the University of San Francisco. He is the author of Visual Complex Analysis.
Finalist for the PROSE Award in Mathematics, Association of American Publishers Tristan Needham's goal is to give a natural and intuitive proof of Gauss's Theorema Egregium. The usual proof of this result is infamously inscrutable and depends on apparently miraculous cancellations, making this a noble and ambitious goal, in which Needham largely succeeds. . . . [What] seems particularly special to me about Needham's book is not just the author's unique voice or the visual presentation of the material, but the fact that it conveys a faithful sense of how (many) research mathematicians actually think about differential geometry. ---Clayton Shonkwiler, American Mathematical Monthly This is a valuable and beautifully created guide to what can at first seem a confusing area of mathematical physics. There are other contenders that try to teach this subject, but this is the best that I have come across so far and I will continue to enjoy learning from it (and almost certainly teaching from it) over the coming years, I am sure. ---Jonathan Shock, Mathemafrica The book is a remarkable and highly original approach to the basic stem of differential geometry. And that mathematical trunk has roots and branches in so many other unexpected yet related subjects, each of which can be equally well approached from the same geometrical point of view. ---Adhemar Bultheel, MAA Reviews