Curvature Scalar
The curvature scalar is given by
where
is the Metric Tensor and 
is the Ricci Tensor.See also Curvature, Gaussian Curvature, Mean Curvature, Metric Tensor, Radius of Curvature,Ricci Tensor, Riemann-Christoffel Tensor- Smarandache-Kurepa Function
- Smarandache Near-to-Primorial Function
- Smarandache Paradox
- Smarandache Sequences
- Smarandache-Wagstaff Function
- Smith Brothers
- Smith Conjecture
- Smith Normal Form
- Smith Number
- Smith's Markov Process Theorem
- Smith's Network Theorem
- Smooth Manifold
- Smooth Number
- Smooth Surface
- Snake
- Snake Eyes
- Snake Oil Method
- Snake Polyiamond
- Snedecor's F-Distribution
- Snellius-Pothenot Problem
- Snowflake
- Snub Cube
- Snub Cuboctahedron
- Snub Disphenoid
- Snub Dodecadodecahedron