>[!abstract] >Certain dynamical systems will, after a sufficiently long but finite time, return to a state arbitrarily close to (for continuous state systems), or exactly the same as (for discrete state systems), their initial state. The *Poincaré recurrence time* is the length of time elapsed until the recurrence ("Poincaré recurrence theorem", 2025). ## References - Poincaré recurrence theorem. (2025, March 22). In *Wikipedia*. https://en.wikipedia.org/w/index.php?title=Poincar%C3%A9_recurrence_theorem&oldid=1279196445 ## Related to - [[Buddhist temporal cosmology]] - [[Ergodicity]] - [[Ergodic theory]]