Implications of Finite Universe Complexity (Edward Conway, 2016).
Abstract (Full text finite.pdf)
We show that if the universe has finite complexity then the laws of physics are time reversible, time is periodic with history eternally repeating, the feasible states of the physical universe are non-arbitrary, and the complexity of the physical universe is constant conditional on knowledge of the laws of physics. Time itself is fundamentally non-unique and defined by our chosen decomposition of the universe into physical states and physics. Furthermore, if the Law of Inertia holds (Newton's 1st Law) then both time and space are periodic. Finite complexity is also a possible explanation for spooky action at a distance.

BibTeX Citation

@misc{Finite,
   author = "Conway, E.",
   title = "Implications of Finite Universe Complexity",
   year = "2016",
   url = "http://finite.edwardconway.net"
 }

Trusted Timestamp
The following pseudocode results in the bitcoin address 1GwftDxYY28ESr4vivNBSof4HQbBL3DQJb which was first funded at 2016-04-25 21:27:08 UTC:

hash = CONCAT(0x00, RIPEMD160(SHA256(finite.pdf)))
1GwftDxYY28ESr4vivNBSof4HQbBL3DQJb = BASE58(CONCAT(hash, SHA256(SHA256(hash))[0..3]))