The cast of Invariance - 2009 includes: David Sarma

Illumination invariance refers to the ability of a system or algorithm to accurately perform a task regardless of changes in lighting conditions. This ensures that the system can process images consistently, even when the brightness or contrast levels vary. In computer vision, illumination invariance is important for tasks like object recognition and tracking in different lighting environments.

Invariance of charge refers to the independence of electrostatic potential of a particle from its speed. That is, the charge of a particle does not vary with its speed. In other words charge is not relativistic as opposed to relativistic quantities such as mass, energy etc.

J. J. Sakurai has written:

'Invariance principles and elementary particles'

Dorian Owen has written:

'Invariance results for FIML estimation of an integrated model of expenditure and portfolio behaviour'