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" />
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" /> and the canonical variant first appeared on August 12, 2022, in a symmetric soup by the [[Open Science Grid]].<ref>{{cata|attribute/xp7_o8y2gbdz0dl31w11156z011/b3s23/C2_2|attribute page}}, {{cata|hashsoup/G2_2/o_ujThHK5FtU7F14976668/b3s23|the soup in question}}</ref>


== See also ==
== See also ==

Revision as of 00:15, 21 August 2023

28P7.2
x = 12, y = 11, rule = B3/S23 b2o9b$2bo9b$bo10b$b2o7b2o$3bo4bo2bo$b2o2b2o2b2ob$o2bo4bo3b$2o7b2ob$10b ob$9bo2b$9b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ GPS 2 LOOP 7 THUMBSIZE 2 ZOOM 20 ]]
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Pattern type Oscillator
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

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] and the canonical variant first appeared on August 12, 2022, in a symmetric soup by the Open Science Grid.[4]

See also

References

  1. ↑ "Class 2 Objects Catalog". Retrieved on March 14, 2009.
  2. ↑ Jason Summers' jslife pattern collection.
  3. ↑ Park Shinhwan (January 6, 2019). Re: Soup search results (discussion thread) at the ConwayLife.com forums
  4. ↑ attribute page, the soup in question
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