Weekender
Jump to navigation
Jump to search
| Weekender | |||||||
| View animated image | |||||||
| View static image | |||||||
| Pattern type | Spaceship | ||||||
|---|---|---|---|---|---|---|---|
| Number of cells | 36 | ||||||
| Bounding box | 18 × 12 | ||||||
| Direction | Orthogonal | ||||||
| Period | 7 (mod: Unknown) | ||||||
| Speed | 2c/7 | Unknown | ||||||
| Heat | 45.1 | ||||||
| Kinetic symmetry | Unspecified | ||||||
| Discovered by | David Eppstein | ||||||
| Year of discovery | 2000 | ||||||
| |||||||
| |||||||
Weekender is a 2c/7 orthogonal spaceship that was found by David Eppstein on January 12, 2000.[1] On April 27, 2000, Stephen Silver found a tagalong for a pair of weekenders (shown below). At present, n weekenders pulling n-1 tagalongs constitute the only known spaceships with speed 2c/7, besides self-sustaining loops of weekender conduits. These were the only known period-7 spaceships until the discovery of lobster in 2011 and the loafer in 2013.
Despite the relative simplicity of its components, a glider synthesis for the weekender had been elusive since its discovery. A weekender synthesis was completed on January 25, 2015, 15 years after its discovery (and coincidentally, on a weekend).[2]
Image gallery
References
- ↑ Jason Summers' jslife pattern collection.
- ↑ Martin Grant (January 25, 2015). "Re: Small Spaceship Syntheses". Retrieved on January 25, 2015.
External links
- Searching for Spaceships - Eppstein's paper describing the discovery of the weekender
- Weekender at the Life Lexicon
Categories:
- Patterns
- Spaceships with 36 cells
- Periodic objects with minimum population 36
- Patterns with 36 cells
- Patterns found by David Eppstein
- Patterns found in 2000
- Patterns that can be constructed with between 90 and 99 gliders
- Spaceships
- Spaceships with period 7
- Orthogonal spaceships
- Spaceships with speed 2c/7
- Spaceships with heat 45
- Non-monotonic spaceships