11/27/2023 0 Comments De carmo differential geometryIt would not surprise me if it quickly becomes the market leader. … this is still the book I would use as a text for a beginning course on this subject. … the author’s writing style is extremely clear and well-motivated. “This is a visually appealing book, replete with many diagrams, lots of them in full color. The author uses a rich variety of colours and techniques that help to clarify difficult abstract concepts.” (Teresa Arias-Marco, zbMATH 1375.53001, 2018) There is also plenty of figures, examples, exercises and applications which make the differential geometry of curves and surfaces so interesting and intuitive. “This book is perfect for undergraduate students. … this book will surely serve very well for students who want to learn differential geometry from the ground up no matter what their main learning goal is.” (Árpád Kurusa, Acta Scientiarum Mathematicarum, Vol. … This book is not a usual textbook, but a very well written introduction to differential geometry, and the colors really help the reader in understanding the figures and navigating through the text. “This is the first textbook on mathematics that I see printed in color. Throughout this book, applications, metaphors and visualizations are tools that motivate and clarify the rigorous mathematical content, but never replace it. The GPS in any car wouldn’t work without general relativity, formalized through the language of differential geometry. In truth, the most profound application of differential geometry is to modern physics, which is beyond the scope of this book. Even better, a south-pointing chariot helps one visualize a parallel vector field along any curve in any surface. Foucault’s Pendulum helps one visualize a parallel vector field along a latitude of the earth. Green’s Theorem makes possible a drafting tool called a planimeter. Clairaut’s Theorem is presented as a conservation law for angular momentum. Evolutes, involutes and cycloids are introduced through Christiaan Huygens' fascinating story: in attempting to solve the famous longitude problem with a mathematically-improved pendulum clock, he invented mathematics that would later be applied to optics and gears. Color is even used within the text to highlight logical relationships.Īpplications abound! The study of conformal and equiareal functions is grounded in its application to cartography. Green-boxed definitions and purple-boxed theorems help to visually organize the mathematical content. Over 300 color illustrations bring the mathematics to life, instantly clarifying concepts in ways that grayscale could not. For the benefit of all readers, the author employs various techniques to render the difficult abstract ideas herein more understandable and engaging. For readers bound for graduate school in math or physics, this is a clear, concise, rigorous development of the topic including the deep global theorems. For readers seeking an elementary text, the prerequisites are minimal and include plenty of examples and intermediate steps within proofs, while providing an invitation to more excursive applications and advanced topics. So the $t$ in $tw_N$ gets out.This is a textbook on differential geometry well-suited to a variety of courses on this topic. We can, therefore, consider the parametrized surfaceį : A \to M, \ \ \ \ A = \left\$ is linear $\forall$ $t$ as the differential of a smooth map. Why there's such an $\epsilon$ that defines $\exp_p$ for $u = tv(s)$? Although this fact can be established under the hypothesis of Proposition 4, it is not necessarily true for an injective, regular parametrized surface (e.g. Where $v(s)$ is a curve in $T_p M$ with $v(0) = v, v'(0) = w_N$, and $\left| v(s) \right| = const$. This is the part of the proof that is lacking: Do Carmo never shows that the parametrization in question is an open mapping (in terms of the surface). U = tv(s), \ 0 \leq t \leq 1, \ -\epsilon < s < -\epsilon Students may find these sources to be a bit easier to read and follow than do Carmo’s text. Since $\exp_p v$ is defined, there exists $\epsilon > 0$ such that $\exp_p u$ is defined for Likewise, David Henderson’s interesting book on differential geometry (intended for self-study) is available for free, chapter-by-chapter download, courtesy of Project Euclid. It is clear that we can assume $w_N \neq 0$. $$\left\langle (d \exp_p)_v (v), (d \exp_p)_v (w_T) \right\rangle = \left\langle v, w_T\right\rangle$$ Since $d \exp_p$ is linear and, by the definition $\exp_p$, Let $w = w_T + w_N$ is parallel to $v$ and $w_N$ is normal to $v$. (Gauss) : Let $p \in M$ and $v \in T_p M$ such that $\exp_p v$ is defined. A couple of questions about the Lemma 3.5.
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