Gauss Equations
If x is a regular patch on a Regular Surface in 
with normal 
, then
 |  |  | (1) |
 | |  | (2) |
 | |  | (3) |
where
, 
, and 
are coefficients of the second Fundamental Form and 
are Christoffel Symbols of the Second Kind.See also Christoffel Symbol of the Second Kind, Fundamental Forms,Mainardi-Codazzi Equations
References
Gray, A. Modern Differential Geometry of Curves and Surfaces. Boca Raton, FL: CRC Press, pp. 398-400, 1993.
- Triangular Graph
- Triangular Hebesphenorotunda
- Triangular Matrix
- Triangular Number
- Triangular Orthobicupola
- Triangular Pyramid
- Triangular Square Number
- Triangular Symmetry Group
- Triangulation
- Triaugmented Dodecahedron
- Triaugmented Hexagonal Prism
- Triaugmented Triangular Prism
- Triaugmented Truncated Dodecahedron
- Triaxial Ellipsoid
- Tribar
- Tribonacci Number
- Tribox
- Trichotomy Law
- Tricolorable
- Tricomi Function
- Tricuspoid
- Tricylinder
- Tridecagon
- Trident
- Trident of Descartes