Cloverleaf interchange: Difference between revisions
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|discoverer = Adam P. Goucher | |discoverer = Adam P. Goucher | ||
|discoveryear = 2016 | |discoveryear = 2016<!--should we be listing this as the discovery year if it was known beforehand?--> | ||
|rulemin = B/S23 | |rulemin = B/S23 | ||
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'''Cloverleaf interchange''' (or '''fourfold [[racetrack]]-[[weld]]-racetrack''') is a {{slcells|56}}-cell [[still life]] exhibiting D8_1 [[symmetry]]. | '''Cloverleaf interchange''' (or '''fourfold [[racetrack]]-[[weld]]-racetrack''') is a {{slcells|56}}-cell [[still life]] exhibiting D8_1 [[symmetry]]. | ||
While known for many years beforehand due to its ability to be hassled, it is notable due to a natural occurrence being found in the [[ash]] of a random [[asymmetric]] [[soup]] by [[Adam P. Goucher]] on August 12, {{year|2016}}.<ref name="calcymanhaul" /><ref name="post34242" /> This made it the single largest known still life to occur completely [[natural]]ly, surpassing the previous record holder, the 46-cell [[professor]]; it had previously arisen semi-naturally in various higher symmetries, including C2_1, C4_1, D2_+1, D4_+1, D4_+2 and D4_x1. It has since been tied in C1 by another, unnamed 56-cell still life found by [[John Goodman]] in September {{year|2021}}.<ref name="post135613" /> | |||
[[BlinkerSpawn]] found a 12-[[glider]] [[synthesis]] on the same day.<ref name="12synthesis" /> [[GUYTU6J]] improved this to {{gliders|10|brief}} gliders on February 5, {{year|2020}}.<ref name="post88936" /> | [[BlinkerSpawn]] found a 12-[[glider]] [[synthesis]] on the same day.<ref name="12synthesis" /> [[GUYTU6J]] improved this to {{gliders|10|brief}} gliders on February 5, {{year|2020}}.<ref name="post88936" /> | ||
Revision as of 11:09, 3 February 2022
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| Pattern type | Strict still life | ||||||||
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| Number of cells | 56 | ||||||||
| Bounding box | 13 × 13 | ||||||||
| Static symmetry | Unspecified | ||||||||
| Discovered by | Adam P. Goucher | ||||||||
| Year of discovery | 2016 | ||||||||
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- For other uses of "cloverleaf", see Cloverleaf (disambiguation).
Cloverleaf interchange (or fourfold racetrack-weld-racetrack) is a 56-cell still life exhibiting D8_1 symmetry.
While known for many years beforehand due to its ability to be hassled, it is notable due to a natural occurrence being found in the ash of a random asymmetric soup by Adam P. Goucher on August 12, 2016.[1][2] This made it the single largest known still life to occur completely naturally, surpassing the previous record holder, the 46-cell professor; it had previously arisen semi-naturally in various higher symmetries, including C2_1, C4_1, D2_+1, D4_+1, D4_+2 and D4_x1. It has since been tied in C1 by another, unnamed 56-cell still life found by John Goodman in September 2021.[3]
BlinkerSpawn found a 12-glider synthesis on the same day.[4] GUYTU6J improved this to 10 gliders on February 5, 2020.[5]
A cloverleaf interchange can be hassled by Carnival shuttles, like this:
| (click above to open LifeViewer) RLE: here Plaintext: here |
References
- ↑ Adam P. Goucher (August 12, 2016). "Haul". Catagolue. Retrieved on August 12, 2016.
- ↑ Apple Bottom (August 12, 2016). Re: Soup search results (discussion thread) at the ConwayLife.com forums
- ↑ dani (September 8, 2021). Re: Soup search results (discussion thread) at the ConwayLife.com forums
- ↑ BlinkerSpawn (August 12, 2016). "Re: Soup search results". ConwayLife.com forums. Retrieved on August 12, 2016.
- ↑ GUYTU6J (February 5, 2020). Re: Thread for your unsure discoveries (discussion thread) at the ConwayLife.com forums
External links
- Cloverleaf interchange at Wikipedia