The pi calculator is a device constructed by Adam P. Goucher in February 2010, which calculates the decimal digits of pi and displays them in the Life universe as 8 × 10 dot matrix characters.
The actual calculation is done in binary, using a streaming spigot algorithm based on linear fractional transformations. The pi calculator is made up of a 188-state computer connected to a printing device via period-8 regulators and a binary-to-decimal conversion mechanism. The complete pattern can be found in Golly's Very Large Patterns online archive.
September 14: ENDW’s first forum post contains an implementation of Goldtiger997's proposedomniship design with velocity (16,9)c/60 and period 600000000. This design allows the construction of spaceships for all non-orthogonal velocities strictly below the spaceship speed limit.
September 10-11: Nora Brownconstructs the first c/6 diagonal puffer, using a reaction by Hunter. iNoMedconstructs some smaller examples the next day. While c/6 diagonal puffers based on the Speed Demonoid design are possible, none have yet been constructed, and any such puffer would be much larger.
... that Garden of Eden patterns with only 45 live cells have been found?
... that there are orphans that are 5 cells high, but 4-cell-high orphans are impossible?
... that 6-cell-high Garden of Eden patterns were constructed as far back as 1973, but 5-cell-high GoEs were unknown until Steven Eker found some in 2016?
... that no way is known for a 3 × 3 pattern to be tiled into an M × N rectangle to produce a Garden of Eden, but that there are 4 × 3, 4 × 4 and larger tiles that can be repeated in this way to produce GoEs?
... that there are spaceship stabilizations of agars?
... that block is the only finite strict still life where each living cell has exactly 3 neighbours?
