Power law
de:power law zh:幂次定律
In physics, a power law relationship between two scalar quantities x and y is any such that the relationship can be written as
where a (the constant of proportionality) and k (the exponent of the power law) are constants.
Examples of power law relationships:
- The Stefan-Boltzmann law
- The inverse-square law of Newtonian gravity
- Gamma correction relating light intensity with voltage
Examples of power law probability distributions:
Power laws are among the most frequent scaling laws that describe the scaling invariance found in many natural phenomena.
External links
- Zipf, Power-laws, and Pareto - a ranking tutorial (http://www.hpl.hp.com/research/idl/papers/ranking/ranking.html)
- A claim that the blogosphere obeys a powerlaw distribution (http://www.shirky.com/writings/powerlaw_weblog.html)
Categories: Physics