Published online by Cambridge University Press: 01 January 2022
I point out that some common folk wisdom about time reversal invariance in classical mechanics is strictly incorrect, by showing some explicit examples in which classical time reversal invariance fails, even among conservative systems. I then show that there is nevertheless a broad class of familiar classical systems that are time reversal invariant.
For many helpful discussions and suggestions, I would like to thank Peter Distelzweig, John Earman, David Malament, Wayne Myrvold, and John D. Norton.