SURFACES: LOCAL THEORY pdf

PARAMETRIZED SURFACES AND THE FIRST FUNDAMENTAL FORM
THE GAUSS MAP AND THE SECOND FUNDAMENTAL FORM
THE CODAZZI AND GAUSS EQUATIONS AND THE FUNDAMENTAL THEOREM OF SURFACE THEORY
COVARIANT DIFFERENTIATION, PARALLEL TRANSLATION, AND GEODESICS
SURFACES: LOCAL THEORY is a compact, 50-page booklet (6 × 9 inches) that presents the essentials of differential geometry from a local viewpoint, structured as a guided sequence of ideas, it connects the intrinsic geometry of a surface to the differential operations that govern it—building from parametrizations to theorems, and from curvature maps to geodesic motion.
The booklet opens with Parametrized Surfaces and the First Fundamental Form, establishing how a surface is described locally and how lengths and angles are encoded through the first fundamental form. From there, it moves to The Gauss Map and the Second Fundamental Form, introducing the normal-direction correspondence and showing how extrinsic curvature data is captured via the second fundamental form.
Next, the text brings these ingredients together in The Codazzi and Gauss Equations and the Fundamental Theorem of Surface Theory, where compatibility conditions are derived and interpreted, this section culminates in the fundamental theorem, clarifying precisely when prescribed metric and curvature data can arise from an actual surface.
The final portion focuses on motion and differentiation on surfaces, covering Covariant Differentiation, Parallel Translation, and Geodesics, here, the booklet develops the tools for differentiating tensorial quantities in a coordinate-free way, examines how vectors evolve under parallel translation, and culminates in the geometric characterization of geodesics.
Overall, SURFACES: LOCAL THEORY is designed as a clear, compact reference and study guide for readers learning how local surface geometry is formulated, analyzed, and related to curvature and intrinsic paths.