Weekender
| Weekender | |||||||||
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| Pattern type | Spaceship | ||||||||
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| Number of cells | 36 | ||||||||
| Bounding box | 18 × 12 | ||||||||
| Direction | Orthogonal | ||||||||
| Period | 7 | ||||||||
| Mod | 7 | ||||||||
| Speed | 2c/7 | Unknown | ||||||||
| Heat | 45.1 | ||||||||
| Discovered by | David Eppstein | ||||||||
| Year of discovery | 2000 | ||||||||
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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, loafer in 2013 and spaghetti monster in 2016.
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]
On September 26, 2015 Chris Cain announced a p444 weekender gun based on a 79-glider synthesis, as well as a p451/p457+ glider-to-weekender converter.[3]
Image gallery
See also
References
- ↑ Jason Summers' jslife pattern collection.
- ↑ Martin Grant (January 25, 2015). "Re: Small Spaceship Syntheses". Retrieved on January 25, 2015.
- ↑ Chris Cain (September 26, 2015). "Re: Small Spaceship Syntheses". Retrieved on October 7, 2015.
External links
- Searching for Spaceships - Eppstein's paper describing the discovery of the weekender
- Weekender at the Life Lexicon
- The Weekender (glider 14105) at David Eppstein's Glider Database
- 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 80 and 89 gliders
- Spaceships
- Spaceships with period 7
- Orthogonal spaceships
- Spaceships with speed 2c/7
- Spaceships with heat 45
- Spaceships with mod 7
- Non-monotonic spaceships