Difference between revisions of "Crab"
m (Pentadecathlon ID) |
|||
| (3 intermediate revisions by 2 users not shown) | |||
| Line 1: | Line 1: | ||
{{Spaceship | {{Spaceship | ||
|name | |name = Crab | ||
|pname | |pname = crab | ||
|type | |type = Tagalong | ||
|c | |c = 25 | ||
|bx | |bx = 13 | ||
|by | |by = 12 | ||
|dir | |dir = Diagonal | ||
|p | |p = 4 | ||
|s | |m = 2 | ||
|h | |s = c/4 | ||
|discoverer | |h = 22.0 | ||
|discoveryear = 2000 | |discoverer = Jason Summers | ||
|synthesis | |discoveryear = 2000 | ||
|synthesisRLE = true | |synthesis = 18 | ||
|life105 | |synthesisRLE = true | ||
|life106 | |life105 = true | ||
|plaintext | |life106 = true | ||
|rle | |plaintext = true | ||
|animated | |rle = true | ||
|viewerconfig = #C [[ TRACKLOOP 4 -1/4 -1/4 THUMBSIZE | |animated = true | ||
|viewerconfig = #C [[ TRACKLOOP 4 -1/4 -1/4 THUMBSIZE 2 GPS 4 ]] | |||
|apgcode = xq4_go217z1b6koox84szy323 | |||
|pentadecathlonid = 25P4H1V1.1 | |||
}} | }} | ||
'''Crab''' (or '''quarter'''<ref>{{CiteLexicon|lex_q.htm#quarter|name=quarter}}</ref>) is a diagonal [[:Category:Spaceships with speed c/4|c/4]] [[spaceship]] that was found by [[Jason Summers]] in September [[:Category:Patterns found in 2000|2000]]. It is the smallest known diagonal spaceship other than the [[glider]] and it consists of two gliders pulling a [[tagalong]]. | '''Crab''' (or '''quarter'''<ref>{{CiteLexicon|lex_q.htm#quarter|name=quarter}}</ref>) is a diagonal [[:Category:Spaceships with speed c/4|c/4]] [[spaceship]] that was found by [[Jason Summers]] in September [[:Category:Patterns found in 2000|2000]]. It is the smallest known diagonal spaceship other than the [[glider]] and it consists of two gliders pulling a [[tagalong]]. | ||
Revision as of 17:03, 3 November 2018
| Crab | |||||||||||
| View animated image | |||||||||||
| View static image | |||||||||||
| Pattern type | Tagalong Spaceship | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Number of cells | 25 | ||||||||||
| Bounding box | 13 × 12 | ||||||||||
| Direction | Diagonal | ||||||||||
| Period | 4 | ||||||||||
| Mod | 2 | ||||||||||
| Speed | c/4 | Unknown | ||||||||||
| Heat | 22.0 | ||||||||||
| Discovered by | Jason Summers | ||||||||||
| Year of discovery | 2000 | ||||||||||
| |||||||||||
| |||||||||||
| |||||||||||
Crab (or quarter[1]) is a diagonal c/4 spaceship that was found by Jason Summers in September 2000. It is the smallest known diagonal spaceship other than the glider and it consists of two gliders pulling a tagalong.
It was noticed by Nicolay Beluchenko in August 2005 that it can be converted into a small tubstretcher, as shown below.[2] This tubstretcher is the basis for the one per generation pattern.
Due to the diagonal glide symmetry and by simple inspection, the spaceship can easily be made to stretch two tub wicks simultaneously. Both cases are instances of a domino dragging a tub or chain of tubs. Be it noted that tub chains are also called barges, and that additional non-stretching variants are possible given synchronized eating at the far ends.
Martin Grant found a synthesis for crab with the help of Tanner Jacobi and Brett Berger on December 26, 2014.[3]
Image gallery
See also
References
- ↑ "quarter". The Life Lexicon. Stephen Silver.
- ↑ H. Koenig (August 5, 2005). "New c/4 Diagonal Tubstretcher". Game of Life News. Retrieved on May 9, 2009.
- ↑ Martin Grant (December 26, 2014). "Re: How about a crab synthesis?". Retrieved on December 26, 2014.
External links
- 25P4H1V1.1 at Heinrich Koenig's Game of Life Object Catalogs
- Crab at Adam P. Goucher's Catagolue
- Patterns
- Spaceships with 25 cells
- Periodic objects with minimum population 25
- Patterns with 25 cells
- Patterns found by Jason Summers
- Patterns found in 2000
- Patterns that can be constructed with 18 gliders
- Spaceships
- Tagalongs
- Spaceships with period 4
- Diagonal spaceships
- Spaceships with speed c/4
- Spaceships with heat 22
- Spaceships with mod 2
- Glide symmetric spaceships