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{{Oscillator|name=Star|pname=star|p=3|h=37.3|c=24|bx=13|by=13|discoverer=Hartmut Holzwart|discoveryear=1993|life105=true|life106=true|plaintext=true|rle=true|animated=true|synthesis=20|synthesisRLE=true}}
{{Oscillator
'''Star''' is a [[period]] [[:Category:Oscillators with period 3|3]] [[oscillator]] that was found by [[:Category:Patterns found by Hartmut Holzwart|Hartmut Holzwart]] on February 16, [[:Category:Patterns found in 1993|1993]].<ref>{{CiteHickersonOscillators}}</ref> It is one of the few known oscillators that is a [[polyomino]] in one of its [[phase]]s. In August, [[:Category:patterns found in 2004|2004]] Jason Summers found a [[:Category:patterns that can be constructed with 20 gliders|20-glider]] [[Glider synthesis|Synthesis]] of this oscillator.<ref>{{CiteSummersPattern|name=jslife}}</ref>
|name             = Star
|pname           = star
|c                = 24
|bx              = 13
|by              = 13
|p               = 3
|m                = 3
|h               = 37.3
|v                = 0.93
|symmetry        = *c
|discoverer       = Hartmut Holzwart
|discoveryear     = 1993
|rulemin          = B3/S23
|rulemax          = B3678/S23678
|isorulemin      = B3-jkqy/S2eik3ijy
|isorulemax      = B2ekn34-aw5-aei678/S1c234-wz5-y678
|synthesis        = 20
|synthesisRLE    = true
|plaintext       = true
|rle             = true
|animated         = true
|viewerconfig    = #C [[ THUMBSIZE 2 GPS 2 ]]
|apgcode          = xp3_0gs46364sgz13e8ogo8e31zy11
|pentadecathlonid = 24P3.178
}}
'''Star''' is a {{period|3}} [[oscillator]] that was found by [[Hartmut Holzwart]] on February 16, {{year|1993}}.<ref>{{CiteHickersonOscillators}}</ref> It is one of the few known oscillators that is a [[polyomino]] in one of its [[phase]]s. In August, {{year|2004}} Jason Summers found a {{gliders|20}} [[synthesis]] of this oscillator.<ref>{{CiteSummersPattern|name=jslife}}</ref>


==Image gallery==
A related period-3 oscillator is '''4 blocks on star''', where four [[block]]s are diagonally connected to and [[hassle]]d by the star. Any or all of the blocks are optional; if present they are lethargic [[beacon]]s. A [[glider synthesis]] of this oscillator was found in August {{year|2021}}.<ref name="post134617" />
{|
 
|-
One in 35,000 odd-width eightfold symmetric soups (D8_1) form a star in the center.
|[[Image:star_gen2.png|framed|left|Star is named after [[generation]] 2 of its evolution]]
 
|[[Image:star_with_blocks.png|framed|left|A related period 3 oscillator. Any or all of the blocks are optional; if present they are lethargic beacons.<br />{{JavaRLE|starwithblocks|brief}}]]
{|style="margin:auto;width:300px;"
|[[File:Star gen2.png|thumb|left|Star is named after [[generation]] 2 of its evolution]]
|{{EmbedViewer
|rle          = x = 11, y = 11, rule = B3/S23
2o2b3o2b2o$o9bo$2bobobobo2$obo5bobo$o9bo$obo5bobo2$2bobobobo$o9bo$2o2b3o2b2o!
|position    = center
|viewerconfig = #C [[ THUMBSIZE 2 AUTOSTART GPS 2 ]]
|caption      = 4 blocks on star
|apgcode      = xp3_3js46364sj3zhje8ogo8ejhz11x1x11
}}
|}
|}


==See also==
Four partial copies of the star can mutually stabilise partial copies of the [[cross]] joining them to form a larger loop-shaped period-3 oscillator, as appeared in a D8_4 soup submitted to Catagolue by [[Charity Engine]] on 2022-11-12.
*[[Cross]]
{{EmbedViewer
|rle          = x = 24, y = 24, rule = B3/S23
4b3o10b3o2$2bobobobo6bobobobo$10bo2bo$obo5bo6bo5bobo$o9b4o9bo$obo8b2o8bobo2$2bobo14bobo2$3bobo12bobo$5b2o10b2o$5b2o10b2o$3bobo12bobo2$2bobo14bobo2$obo8b2o8bobo$o9b4o9bo$obo5bo6bo5bobo$10bo2bo$2bobobobo6bobobobo2$4b3o10b3o!
|position    = center
|viewerconfig = #C [[ HEIGHT 576 THUMBSIZE 2 AUTOSTART GPS 2 ]]
|caption      = star-cross weld hybrid
|apgcode      = xp3_0gs46364soowoos46364sgz13eooy11111y1ooe31zxppfy8fppz8sn11xggo88oggx11ns8zw326c62311w11326c623
}}
 
== See also ==
* [[Cross]]


==References==
== References ==
<references/>
<references>
<ref name="post134617">{{LinkForumThread
|format = ref
|title  = Re: Synthesising Oscillators
|p      = 134617
|author = Aleph
|date  = August 6, 2021
}}</ref>
</references>


==External links==
== External links ==
{{LinkWeisstein|Star.html}}
{{LinkLexicon|lex_s.htm#star}}
{{LinkLexicon|lex_s.htm#star}}
{{LinkPentadecathlonObject|24P3.178}}
{{LinkCatagolue|xp3_0gs46364sgz13e8ogo8e31zy11}}
{{LinkCatagolue|xp3_3js46364sj3zhje8ogo8ejhz11x1x11|patternname=4 blocks on star}}
{{seminatural}}
{{Sparker|p=3|strength=weak}}
__NOTOC__
[[Category:Polyominoes]]

Latest revision as of 15:09, 6 August 2026

Star
4b3o4b2$2bobobobo2b2$obo5bobo$o9bo$obo5bobo2$2bobobobo2b2$4b3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ THUMBSIZE 2 GPS 2 ]]
View animated image
View static image
Pattern type Oscillator
Number of cells 24
Bounding box 13 × 13
Period 3 (mod: 3)
Heat 37.3
Volatility 0.93 | 0.93
Kinetic symmetry *c
Discovered by Hartmut Holzwart
Year of discovery 1993

Star is a period-3 oscillator that was found by Hartmut Holzwart on February 16, 1993.[1] It is one of the few known oscillators that is a polyomino in one of its phases. In August, 2004 Jason Summers found a 20-glider synthesis of this oscillator.[2]

A related period-3 oscillator is 4 blocks on star, where four blocks are diagonally connected to and hassled by the star. Any or all of the blocks are optional; if present they are lethargic beacons. A glider synthesis of this oscillator was found in August 2021.[3]

One in 35,000 odd-width eightfold symmetric soups (D8_1) form a star in the center.

Star is named after generation 2 of its evolution
x = 11, y = 11, rule = B3/S23 2o2b3o2b2o$o9bo$2bobobobo2$obo5bobo$o9bo$obo5bobo2$2bobobobo$o9bo$2o2b3o2b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 AUTOSTART GPS 2 ]]
4 blocks on star
(click above to open LifeViewer)
Catagolue: here

Four partial copies of the star can mutually stabilise partial copies of the cross joining them to form a larger loop-shaped period-3 oscillator, as appeared in a D8_4 soup submitted to Catagolue by Charity Engine on 2022-11-12.

x = 24, y = 24, rule = B3/S23 4b3o10b3o2$2bobobobo6bobobobo$10bo2bo$obo5bo6bo5bobo$o9b4o9bo$obo8b2o8bobo2$2bobo14bobo2$3bobo12bobo$5b2o10b2o$5b2o10b2o$3bobo12bobo2$2bobo14bobo2$obo8b2o8bobo$o9b4o9bo$obo5bo6bo5bobo$10bo2bo$2bobobobo6bobobobo2$4b3o10b3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ HEIGHT 576 THUMBSIZE 2 AUTOSTART GPS 2 ]]
star-cross weld hybrid
(click above to open LifeViewer)
Catagolue: here

See also

References

  1. ↑ Dean Hickerson's oscillator stamp collection.
  2. ↑ Jason Summers' jslife pattern collection.
  3. ↑ Aleph (August 6, 2021). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
Retrieved from "https://conwaylife.com/w/index.php?title=Star&oldid=174720"