# Time reversibility

## Type of physical or mathematical process / From Wikipedia, the free encyclopedia

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A mathematical or physical process is **time-reversible** if the dynamics of the process remain well-defined when the sequence of time-states is reversed.

Type of physical or mathematical process

A deterministic process is time-reversible if the time-reversed process satisfies the same dynamic equations as the original process; in other words, the equations are invariant or symmetrical under a change in the sign of time. A stochastic process is reversible if the statistical properties of the process are the same as the statistical properties for time-reversed data from the same process.