1 TABLE OF CONTENTS Chapter 1 Euclidean space A. B. C. D. E. F. G. The basic vector space Distance Right angle Angles A little trigonometry Balls and spheres Isoperimetric inequalities Chapter 2 Differentiation A. B. C. D. E. F. G. H. I. J. K. L. M. Functions of one real variable Lengths of curves Directional derivatives Pathology Differentiability of real-valued functions Sufficient condition for differentiability A first look at critical points Geometric significance of the gradient A little matrix algebra Derivatives for functions Rn → Rm The chain rule Confession Homogeneous functions and Euler’s formula Chapter 3 Higher order derivatives A. B. C. D. E. F. G. H. I. Partial derivatives Taylor’s theorem The second derivative test for R2 The nature of critical points The Hessian matrix Determinants Invertible matrices and Cramer’s rule Recapitulation A little matrix calculus 2 Chapter 4 Symmetric matrices and the second derivative test A. B. C. D. E. F. G. Eigenvalues and eigenvectors Eigenvalues of symmetric matrices Two-dimensional pause The principal axis theorem Positive definite matrices The second derivative test A little matrix calculus Chapter 5 Manifolds A. B. C. D. E. F. G. Hypermanifolds Intrinsic gradient-warm up Intrinsic critical points Explicit description of manifolds Implicit function theorem The tangent space Manifolds that are not hyper Chapter 6 Implicit function theorem A. B. C. D. E. F. G. H. I. Implicit presentation Rank Implicit function theorem Results Parametric presentation The explicit bridge The derivative reconsidered Conformal mapping Examples of conformal mappings Chapter 7 Cross product A. B. C. D. E. F. G. Definition of the cross product The norm of the cross product Triple products Orientation Right hand rule What is SO(3)? Orientation reversal 3 Chapter 8 Volumes of parallelograms A. B. C. D. Volumes in dimensions 1, 2, 3 The Gram determinant Volumes in all dimensions Generalization of the cross product Chapter 9 Integration on Rn A. B. C. D. E. F. G. H. I. The idea of Riemann sums Step functions The Riemann integral Sufficient conditions for integrability The fundamental theorem The Fubini theorem Iterated integrals Volume Integration and volume Chapter 10 Further investigation of integration A. B. C. D. E. F. G. H. I. Topological background Topological characterization of contentedness Integration over more general sets Cavalieri’s principle Elementary matrices Linear changes of variables The general formula for change of variables The gamma function Notation for the Jacobian determinant Chapter 11 Integration on manifolds A. B. C. D. E. The one-dimensional case The general case Hypermanifolds The Cauchy-Binet determinant theorem Miscellaneous applications 4 Chapter 12 Green’s theorem A. B. C. D. E. F. G. The basic theorem of Green Line integrals A general Green’s theorem Areas by means of Green Conservative vector fields Sufficiency A slick proof of sufficiency Chapter 13 Stokes’ theorem A. B. C. D. E. F. G. H. I. Orientable surfaces The boundary of a surface Inherited orientation The basic calculation The basic theorem, curl Stokes’ theorem What is curl? Curlometer Conservative fields revisited Chapter 14 Gauss’ theorem A. B. C. D. E. F. Green’s theorem reinterpreted Gauss’ theorem for Rn The proof Gravity Other differentiation formulas The vector potential Chapter 15 ∇ in other coordinates A. B. C. D. E. F. G. H. I. Biorthogonal systems The gradient The divergence The curl Curvilinear coordinates The gradient Spherical coordinates The divergence The curl 5 J. Orthogonal curvilinear coordinates K. The Laplacian L. Parabolic coordinates Index