logarithm
where ln denotes the logarithmic function. This is equivalent to saying that y = logax if and only if x = ay or that the function logax is the inverse function of ax. The following properties hold, where x, y, and r are real, with x,y > 0:
(i) loga(xy) = loga x + loga y.
(ii) loga(1/x) = −loga x.
(iii) loga(xr) = r loga x.
(iv) Logarithms to different bases are related by the formula
(v) 
Logarithms to base 10 are called common logarithms. Logarithms to base e are called natural logarithms. See complex logarithm.
- linear transformation
- line integral
- line of action
- line of symmetry
- line segment
- Liouville, Joseph
- Liouville numbers
- Liouville's Theorem
- Lipschitz condition
- Lissajous curve
- litre
- little o notation
- Littlewood, John Edensor
- LMS
- ln
- load
- Lobachevsky, Nikolai Ivanovich
- locally compact
- local maximum
- located vector
- location
- locus
- log
- logarithm
- logarithmic function