28P7.2: Difference between revisions
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'''28P7.2''' is an unnamed [[period]] [[:Category:Oscillators with period 7|7]] [[oscillator]] discovered by [[Dean Hickerson]] in [[:Category:patterns found in 1998|1998]]. In terms of its 28 [[cell]]s, it is tied with oscillators [[burloaferimeter]] and [[28P7. | '''28P7.2''' is an unnamed [[period]] [[:Category:Oscillators with period 7|7]] [[oscillator]] discovered by [[Dean Hickerson]] in [[:Category:patterns found in 1998|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, [[:Category:patterns found in 2000|2000]] [[Mark Niemiec]] and [[Jason Summers]] found a [[:Category:patterns that can be constructed with 22 gliders|22]]-[[glider]] [[Glider synthesis|synthesis]] of this oscillator.<ref>{{CiteSummersPattern|name=jslife}}</ref> | ||
== See also == | == See also == | ||
Revision as of 22:13, 19 March 2019
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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]
See also
References
- ↑ "Class 2 Objects Catalog". Retrieved on March 14, 2009.
- ↑ Jason Summers' jslife pattern collection.
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