Period-45 glider gun
|Period-45 glider gun|
|View static image|
|Number of cells||147|
|Discovered by||Matthias Merzenich|
|Year of discovery||2010|
Period-45 glider gun is a true period 45 glider gun discovered by Matthias Merzenich on April 29, 2010. Its core is part of an agar with 90-degree rotational symmetry that produces pi-heptominoes. One of the hassling pentadecathlons extracts the output glider with its v spark, and the remaining three (in the original one-barrelled version below) suppress the pies with their domino spark.
Soon after its discovery, Adam P. Goucher and Dave Greene reduced the bounding box with another pi-suppressing mechanism at the cost of higher population. In the infobox is a further improvement by Tanner Jacobi in 2015 with stable pi eaters found by bellman.
Glider syntheses for the one-barrelled and four-barrelled versions of the original gun (costing 46 and 40 gliders respectively) were posted by Jeremy Tan on January 5, 2020, in response to a less efficient synthesis by Entity Valkyrie using a different method.
- Matthias Merzenich (April 29, 2010). Re: Pattern of the Year 2010 competition (discussion thread) at the ConwayLife.com forums
- H. Koenig (April 29, 2010). "New Period 45 Glider Gun". Game of Life News. Retrieved on May 29, 2020.
- Tanner Jacobi (April 12, 2015). Re: Execution of Old Guns by Variable-Speed Firing Squad (discussion thread) at the ConwayLife.com forums
- Jeremy Tan (January 5, 2020). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums