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{{Oscillator|p=100|name=Centinal|pname=centinal|bx=52|by=17|h=52|discoverer=Bill Gosper|c=70|life105=true|life106=true|plaintext=true|rle=true}}
{{Oscillator
'''Centinal''' was found by [[:Category:Patterns found by Bill Gosper|Bill Gosper]] no earlier than [[:Category:Patterns found in 1973|1973]]. It combines the mechanisms of the [[Twin bees shuttle|period 46]] and [[P54 shuttle|period 54]] shuttles.
|name             = Centinal
|pname           = centinal
|f1              = Shuttle
|c                = 70
|bx               = 52
|by               = 17
|p                = 100
|m                = 100
|h               = 52
|v                = 0.95
|sv              = 0.95
|symmetry        = -c
|discoverer       = Bill Gosper
|rulemin          = B3/S23
|rulemax          = B3/S238
|isorulemin      = B3/S23-c
|isorulemax      = B34e6cn/S234ce5ek6n7e8
|synthesis        = 16
|synthesisRLE    = true
|plaintext       = true
|rle             = true
|animated        = true
|apgcode          = xp100_178cyao8gy0ccy0g8oyac871zye1m31y5322z0g8oyae972xooy079dyao8gz23yzy532
|pentadecathlonid = 70P100.1
|viewerconfig    = #C [[ GPS 10 ZOOM 10 ]]
}}
'''Centinal''' is a {{period|100}} [[shuttle]] [[oscillator]] that was found by [[Bill Gosper]] no earlier than {{year|1973}} and no later than 1987, being the first oscillator of this period to be discovered. It combines the mechanisms of the [[Twin bees shuttle|period 46]] and [[P54 shuttle|period 54]] shuttles. Its [[duoplet]] [[spark]] is able to reflect gliders by 90 degrees, a property that Gosper used circa 1984 to construct a p1100 [[MWSS]] gun.<ref>{{CiteHickersonOscillators|accessdate=March 14, 2020}}</ref><ref>{{LinkGoLNews|2007/12/early_mwss_gun_in_golly_13.html|title=Early MWSS gun in Golly 1.3|date=December 17, 2007|author=Dave Greene}}</ref>


==See also==
== Gallery ==
*[[p54 shuttle]]
{{EmbedViewer
*[[Twin bees shuttle]]
|pname = centinalreflector
|position    = center
|viewerconfig = #C [[ THUMBSIZE 2 GPS 10 AUTOSTART LOOP 70 PAUSE 1 ]]
|caption      = Centinal reflecting a glider
}}


==External links==
{|style="margin-left:auto;margin-right:auto;width:5%;"
[http://www.argentum.freeserve.co.uk/lex_c.htm#centinal Centinal] at the Life Lexicon
||{{EmbedViewer
|pname        = figureeightoncentinal
|position    = center
|viewerconfig = #C [[ GPS 50 THUMBSIZE 2 ]]
|caption      = [[Figure eight]] on centinal, the former smallest known p200 oscillator by population
|apgcode      = xp200_178cyao8gy0ccy0g8oyac871zye1m31y5322z0g8oyae972xooy079dyao8gz23yiggyk32zygoq1851
}}
|}
 
== See also ==
* [[p54 shuttle]]
* [[Twin bees shuttle]]
 
== References ==
<references />
 
== External links ==
* {{LinkLexicon|filename=lex_c.htm#centinal}}
* {{LinkCatagolue|xp100_178cyao8gy0ccy0g8oyac871zye1m31y5322z0g8oyae972xooy079dyao8gz23yzy532|format=extended}}
* {{LinkPentadecathlonObject|70P100.1}}
 
{{Sparker|p=100|type=V|strength=strong|type2=reflecting duoplet|strength2=strong}}
__NOTOC__

Latest revision as of 23:25, 17 January 2026

Centinal
x = 52, y = 17, rule = B3/S23 2o48b2o$bo48bo$bobo21b2o21bobo$2b2o8bo12b2o12b2o7b2o$11b2o26bobo$10b2o 29bo$11b2o2b2o22b3o4$11b2o2b2o22b3o$10b2o29bo$11b2o26bobo$2b2o8bo12b2o 12b2o7b2o$bobo21b2o21bobo$bo48bo$2o48b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ GPS 10 ZOOM 10 ]]
View animated image
View static image
Pattern type Oscillator
Oscillator type Shuttle
Number of cells 70
Bounding box 52 × 17
Period 100 (mod: 100)
Heat 52
Volatility 0.95 | 0.95
Kinetic symmetry -c
Discovered by Bill Gosper
Year of discovery Unknown

Centinal is a period-100 shuttle oscillator that was found by Bill Gosper no earlier than 1973 and no later than 1987, being the first oscillator of this period to be discovered. It combines the mechanisms of the period 46 and period 54 shuttles. Its duoplet spark is able to reflect gliders by 90 degrees, a property that Gosper used circa 1984 to construct a p1100 MWSS gun.[1][2]

x = 52, y = 22, rule = b3/s23 25bo26b$23b2o27b$24b2o26b3$2o48b2o$bo48bob$bobo36bo7bobob$2b2o7b2o5b2o 13bo5bo2bo5b2o2b$18bobo11b2o5bo12b$12b2o6bo10b2o10bo8b$8bobo2bo4b3o11b 2o4b2o3bo8b$9b3obo24b5o9b2$9b3obo24b5o9b$8bobo2bo4b3o11b2o4b2o3bo8b$ 12b2o6bo10b2o10bo8b$18bobo11b2o5bo12b$2b2o7b2o5b2o13bo5bo2bo5b2o2b$bob o36bo7bobob$bo48bob$2o48b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 GPS 10 AUTOSTART LOOP 70 PAUSE 1 ]]
Centinal reflecting a glider
(click above to open LifeViewer)
RLE: here Plaintext: here
x = 52, y = 25, rule = B3/S23 2o48b2o$bo48bo$bobo21b2o21bobo$2b2o14b2o5b2o5b2o14b2o$18bobo10bobo$18b ob2o9bo$19b2o10b3o$19bo2$19bo$19b2o10b3o$18bob2o9bo$18bobo10bobo$2b2o 14b2o5b2o5b2o14b2o$bobo21b2o21bobo$bo48bo$2o48b2o3$24b2o$22bob2o$21bo$ 24bo$20b2obo$20b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 50 THUMBSIZE 2 ]]
Figure eight on centinal, the former smallest known p200 oscillator by population
(click above to open LifeViewer)
RLE: here Plaintext: here
Catagolue: here

See also

References

  1. ↑ Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.
  2. ↑ Early MWSS gun in Golly 1.3 at Game of Life News. Posted by Dave Greene on December 17, 2007.


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