c/7 orthogonal
| c/7 orthogonal | ||
| ||
| Spaceship | Yes | |
|---|---|---|
| Puffer | Yes | |
| Rake | Yes | |
| Wickstretcher | No | |
| Gun | Yes | |
c/7 orthogonal is an orthogonal speed that is equivalent to one seventh of the speed of light.
Spaceships
On February 17, 2013 Josh Ball discovered the first c/7 orthogonal spaceship, the loafer.
Using caterloopillar technology, Michael Simkin constructed a c/7 orthogonal ship on April 16, 2016.[1]
On February 4, 2017, Matthias Merzenich discovered 339P7H1V0, a large p7 width-19 bilaterally-symmetric c/7 orthogonal spaceship. These ships can be chained by nontrivial spark interactions to produce an infinite number of distinct c/7 orthogonal spaceships.[2]
On December 5, 2022, Frank Everdij discovered taco, another bilaterally symmetric spaceship, using ikpx2. Its front end contains two copies of the loafer's front end, while its back end produces two one-bit tail sparks.[3]
On April 17, 2024, Caleb R. Hilton discovered 139P7H1V0, a bilaterally symmetric spaceship with strong forward dot sparks using qfind. Its front end contains two copies of a wave found by Park Shinhwan, and it is the first known non-monotonic elementary c/7 orthogonal spaceship. Notably, its two strong forward dot sparks allow it to run over a few still lifes and oscillators and remain intact. Its edge can also delete blinkers and gliders without affecting it; therefore, it is also an edge-repair spaceship.
Guns
Loafer can be synthesized from 8 gliders, allowing the construction of guns.[4]
See also
- c/7 diagonal
- Spaceships with speed c/7 (category)
- Speeds (category)
References
- ↑ Michael Simkin (April 16, 2016). Re: Caterloopillar WIP (all speeds < c/4) (discussion thread) at the ConwayLife.com forums
- ↑ Matthias Merzenich (July 26, 2019). Re: Spaceship Discussion Thread (discussion thread) at the ConwayLife.com forums
- ↑ Frank Everdij (December 5, 2022). Re: Spaceship Discussion Thread (discussion thread) at the ConwayLife.com forums
- ↑ Shannon Omick (February 18, 2013). Re: c/7 orthogonal spaceships (discussion thread) at the ConwayLife.com forums
External links