Covariance (disambiguation)
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Covariance is a measure of how much two variables change together, and may refer to:
- Covariance matrix, a matrix of covariances between a number of variables
- Cross-covariance, the covariance between two vectors of variables
- Autocovariance, the covariance of a signal with a time-shifted version of itself
- Covariance function, a function giving the covariance of a random field with itself at two locations
- Covariant transformation, a rule that describes how certain physical entities change under a change of coordinate system
- Covariance, meaning invariance of equations to changes (such as Lorentz transformations) of coordinate system (inaccurate but common usage in quantum mechanics)
- Covariance and contravariance of vectors, properties of how vector coordinates change under a change of basis
- Covariance and contravariance of functors, properties of functors
- Covariance and contravariance (computer science), a system of class relations in computer science
- General covariance, the invariance of the form of physical laws under arbitrary differential coordinate transformations
- Lorentz covariance, a property of space-time that follows from the special theory of relativity
- Poincaré covariance, related to Lorentz covariance
- Eddy covariance, an atmospheric flux measurement technique
[edit] See also
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