28P7.2: Difference between revisions
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'''28P7.2''' is an unnamed {{period|7}} [[oscillator]] discovered by [[Dean Hickerson]] in {{year|1998}}. In terms of its 28 [[cell]]s, it is tied with oscillators [[burloaferimeter]], [[28P7.1]], and [[28P7.3]] as the smallest known period 7 oscillator.<ref>{{cite web|url=http://pentadecathlon.com/objects/class2/class2.php?part=2 |title=Class 2 Objects Catalog |accessdate=March 14, 2009}}</ref> In September, {{year|2000}} [[Mark Niemiec]] and [[Jason Summers]] found a {{gliders|22}} [[synthesis]] of this oscillator.<ref>{{CiteSummersPattern|name=jslife}}</ref> | '''28P7.2''' is an unnamed {{period|7}} [[oscillator]] discovered by [[Dean Hickerson]] in {{year|1998}}. In terms of its 28 [[cell]]s, it is tied with oscillators [[burloaferimeter]], [[28P7.1]], and [[28P7.3]] as the smallest known period 7 oscillator.<ref>{{cite web|url=http://pentadecathlon.com/objects/class2/class2.php?part=2 |title=Class 2 Objects Catalog |accessdate=March 14, 2009}}</ref> In September, {{year|2000}} [[Mark Niemiec]] and [[Jason Summers]] found a {{gliders|22}} [[synthesis]] of this oscillator.<ref>{{CiteSummersPattern|name=jslife}}</ref> | ||
A [[stator]] variant of this oscillator appeared [[semi-natural]]ly on October 28, {{year|2018}}, in a [[symmetric]] [[soup]] submitted to [[Catagolue]] by [[carybe]].<ref name="post67318" /> | |||
== See also == | == See also == | ||
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== References == | == References == | ||
<references /> | <references> | ||
<ref name="post67318">{{LinkForumThread | |||
|format = ref | |||
|title = Re: Soup search results | |||
|p = 67318 | |||
|author = Dannyu NDos | |||
|date = January 6, 2019 | |||
}}</ref> | |||
</references> | |||
== External links == | == External links == | ||
Revision as of 19:07, 8 March 2020
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| Pattern type | Oscillator | ||||||||||
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| Number of cells | 28 | ||||||||||
| Bounding box | 12 × 11 | ||||||||||
| Period | 7 (mod: 7) | ||||||||||
| Heat | 5.1 | ||||||||||
| Volatility | 0.42 | 0.42 | ||||||||||
| Kinetic symmetry | Unspecified | ||||||||||
| Discovered by | Dean Hickerson | ||||||||||
| Year of discovery | 1998 | ||||||||||
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28P7.2 is an unnamed period-7 oscillator discovered by Dean Hickerson in 1998. In terms of its 28 cells, it is tied with oscillators burloaferimeter, 28P7.1, and 28P7.3 as the smallest known period 7 oscillator.[1] In September, 2000 Mark Niemiec and Jason Summers found a 22-glider synthesis of this oscillator.[2]
A stator variant of this oscillator appeared semi-naturally on October 28, 2018, in a symmetric soup submitted to Catagolue by carybe.[3]
See also
References
- ↑ "Class 2 Objects Catalog". Retrieved on March 14, 2009.
- ↑ Jason Summers' jslife pattern collection.
- ↑ Dannyu NDos (January 6, 2019). Re: Soup search results (discussion thread) at the ConwayLife.com forums
External links
- 28P7.2 at Heinrich Koenig's Game of Life Object Catalogs
Categories:
- Patterns
- Oscillators with 28 cells
- Periodic objects with minimum population 28
- Patterns with 28 cells
- Patterns found by Dean Hickerson
- Patterns found in 1998
- Patterns that can be constructed with 22 gliders
- Oscillators
- Oscillators with period 7
- Oscillators with mod 7
- Oscillators with heat 5
- Oscillators with volatility 0.42
- Oscillators with strict volatility 0.42
- Patterns with 180-degree rotation symmetry
- Unnamed periodic objects