7-engine Cordership: Difference between revisions
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The '''7-engine Cordership''' is a [[c/12 diagonal]] [[spaceship]] that was discovered by [[Dean Hickerson]] on August 14, {{year|1993}}. Until the discovery of the [[6-engine Cordership]] almost five years later, it was the [[Cordership]] that used the fewest known possible [[switch engine]]s. Corderships that use as few as [[2-engine Cordership|2 engines]] are now known. | The '''7-engine Cordership''' is a [[c/12 diagonal]] [[spaceship]] that was discovered by [[Dean Hickerson]] on August 14, {{year|1993}}. Until the discovery of the [[6-engine Cordership]] almost five years later, it was the [[Cordership]] that used the fewest known possible [[switch engine]]s. Corderships that use as few as [[2-engine Cordership|2 engines]] are now known. | ||
This particular Cordership can be used to reflect [[glider]]s in a variety of ways. The image below shows two gliders that will be turned counterclockwise by 90 degrees (in red), a glider that will be reflected 180 degrees (in green), and a glider that will be turned into a southbound [[lightweight spaceship]] (in blue).<ref>[[Alan Hensel]]'s [http://www.ibiblio.org/lifepatterns/ lifep.zip pattern collection].</ref> For another method of performing a 180-degree glider reflection using the 7-engine Cordership, see [[glider loop]]. | This particular Cordership can be used to reflect [[glider]]s in a variety of ways. The image below shows two gliders that will be turned counterclockwise by 90 degrees (in red), a glider that will be reflected 180 degrees (in green), and a glider that will be turned into a southbound [[lightweight spaceship]] (in blue).<ref>[[Alan Hensel]]'s [http://www.ibiblio.org/lifepatterns/ lifep.zip pattern collection].</ref><ref>[https://conwaylife.com/ref/lifepage/patterns/corder2.html <tt>corder2.lif</tt>] at [[Paul Callahan]]'s Life Pattern Catalog</ref> For another method of performing a 180-degree glider reflection using the 7-engine Cordership, see [[glider loop]]. | ||
[[Image:7enginecordership_reflections.png|framed|center|Gliders about to be reflected off of the ship<br />red:90˚, green:180˚, blue:45˚ | [[Image:7enginecordership_reflections.png|framed|center|Gliders about to be reflected off of the ship<br />red:90˚, green:180˚, blue:45˚ | ||
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==External links== | ==External links== | ||
{{LinkEppstein|21362|patternname=The Cordership (glider 21362)}} | {{LinkEppstein|21362|patternname=The Cordership (glider 21362)}} | ||
{{LinkCatagolue|xq96_yi33zyaooydgs2iczyr77866zy266yrgcc0q996zyyg0j33z0gs8ogyrk1087zxoe2yzybo44oze0333yjg8048gyjeehdc1y1oozyi4aha40782hnezyfg0gyho88gy966zy8ggn723110d74y0oggy6c1g066y1ggzyn11gt5y7137y211zyms0676y8111|format=extended}} | {{LinkCatagolue|xq96_yi33zyaooydgs2iczyr77866zy266yrgcc0q996zyyg0j33z0gs8ogyrk1087zxoe2yzybo44oze0333yjg8048gyjeehdc1y1oozyi4aha40782hnezyfg0gyho88gy966zy8ggn723110d74y0oggy6c1g066y1ggzyn11gt5y7137y211zyms0676y8111|format=extended}} | ||
Revision as of 10:03, 30 April 2022
| 7-engine Cordership | |||||||||
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| Pattern type | Spaceship | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Family | Cordership | ||||||||
| Number of cells | 180 | ||||||||
| Bounding box | 71 × 65 | ||||||||
| Direction | Diagonal | ||||||||
| Period | 96 (mod: 48) | ||||||||
| Speed | c/12 | 8c/96 | ||||||||
| Heat | 196.3 | ||||||||
| Kinetic symmetry | Unspecified | ||||||||
| Discovered by | Dean Hickerson | ||||||||
| Year of discovery | 1993 | ||||||||
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The 7-engine Cordership is a c/12 diagonal spaceship that was discovered by Dean Hickerson on August 14, 1993. Until the discovery of the 6-engine Cordership almost five years later, it was the Cordership that used the fewest known possible switch engines. Corderships that use as few as 2 engines are now known.
This particular Cordership can be used to reflect gliders in a variety of ways. The image below shows two gliders that will be turned counterclockwise by 90 degrees (in red), a glider that will be reflected 180 degrees (in green), and a glider that will be turned into a southbound lightweight spaceship (in blue).[1][2] For another method of performing a 180-degree glider reflection using the 7-engine Cordership, see glider loop.
red:90˚, green:180˚, blue:45˚ RLE: here
See also
References
- ↑ Alan Hensel's lifep.zip pattern collection.
- ↑ corder2.lif at Paul Callahan's Life Pattern Catalog
External links
- The Cordership (glider 21362) at David Eppstein's Glider Database
- 7-engine Cordership at Adam P. Goucher's Catagolue (extended)
- 180P96H8V8.1 at Heinrich Koenig's Game of Life Object Catalogs
Categories:
- Patterns
- Spaceships with between 180 and 189 cells
- Periodic objects with minimum population between 180 and 189
- Patterns with between 180 and 189 cells
- Patterns found by Dean Hickerson
- Patterns found in 1993
- Outer-totalistically endemic patterns
- Isotropically endemic patterns
- Spaceships
- Spaceships with period 96
- Diagonal spaceships
- Spaceships with speed c/12
- Spaceships with unsimplified speed 8c/96
- Spaceships with heat between 190 and 199
- Cordership variants
- Spaceships with mod 48
- Engineered spaceships
- Non-monotonic spaceships
- Glide symmetric spaceships