surface integral
or 
. If f is identically 1, then the integral 
defines the surface area of Σ. The integral
defines the flux of F through Σ. If r(u,v), where (u,v) ε U ⊆ R2, is a parametrization of Σ, then the surface integrals are defined by
where × denotes the vector product. See divergence theorem, Stokes' theorem.
- Lobachevsky, Nikolai Ivanovich
- locally compact
- local maximum
- located vector
- location
- locus
- log
- logarithm
- logarithmic function
- logarithmic plotting
- logarithmic scale
- logarithmic series
- logarithmic spiral
- logic
- logically equivalent
- logic gate
- logicism
- logistic map
- logistic map
- lognormal distribution
- log paper
- long division
- longitude
- longitudinal study
- longitudinal wave