Time isotropy

Isotropy of time - the invariance of the laws of classical mechanics and electrodynamics with respect to a change in sign of time, that is, with respect to replacing the future with the past. This means that if, according to the laws of classical mechanics and electrodynamics, any process is possible, then a process inverse to it is possible, in which the physical system goes through the same states in the reverse order. Isotropy is one of the key properties of time in classical mechanics and electrodynamics. Isotropy of time means the independence of the laws of motion of the system from a change in the sign of time ^[1] . It is necessary to distinguish between isotropy and uniformity of time . Time does not possess the property of isotropy in thermodynamics, elementary particle physics, and general relativity .