Burloaferimeter is a period -7 oscillator that was found by David Buckingham in 1972 .[1] [2] In terms of its 28 cells , it is tied with the three unnamed oscillators 28P7.1 , 28P7.2 , and 28P7.3 as the smallest known period 7 oscillator.[3] In terms of bounding box , the outright winner is an 11×9 burloaferimeter stator variant .[4] It is the only known oscillator with a heat below 2.[5]
Etymology
According to Mark D. Niemiec [6] , a loaf was called a Bread Loaf by his group, which then was abbreviated to Br'loaf, then became burloaf. "Burloaf" has a population of 7, which "measures" burloaferimeter's period.
Variants
x = 16, y = 16, rule = B3/S23
6bo2bo6b$6b4o6b$16b$4b8o4b$3bo8bo3b$3bo3b3o2bo3b$2obobo2bo3bob2o$bobob
2o3bobobob$bobobo3b2obobob$2obo3bo2bobob2o$3bo2b3o3bo3b$3bo8bo3b$4b8o4b$
16b$6b4o6b$6bo2bo6b!
#C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]]
#C [[ THUMBSIZE 2 ]]
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C4_4-symmetric quadruple burloaferimeter variant found by Park Shinhwan on Catagolue in November 2016.[7] (click above to open LifeViewer )RLE : here Plaintext : here Catagolue : here
x = 16, y = 16, rule = B3/S23
6b2o2b2o4b$6b2o2b2o4b$16b$4b8o4b$2obo8bo3b$2obo3b3o2bo3b$3bobobo4bob2o$
3bobo3b2obob2o$2obob2o3bobo3b$2obo4bobobo3b$3bo2b3o3bob2o$3bo8bob2o$4b
8o4b$16b$4b2o2b2o6b$4b2o2b2o6b!
#C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]]
#C [[ THUMBSIZE 2 ]]
Please enable Javascript to view this LifeViewer.
C4_4-symmetric quadruple burloaferimeter variant found by Apple Bottom on Catagolue on June 16 2017.[8] (click above to open LifeViewer )RLE : here Plaintext : here Catagolue : here
A 28 -glider synthesis for the first variant was discovered by Luka Okanishi shortly after,[9] and was improved to 24 gliders by Jeremy Tan on January 5, 2020 .[10]
On September 27, 2020, a burloaferimeter stator variant appeared in an asymmetric soup found by Rob Liston , becoming the first period-7 oscillator to occur naturally .[11] A 12 -glider synthesis based on this soup was found soon afterwards due to contributions by various users on Discord.[12] A second burloaferimeter variant occurred on January 9, 2021 , in a soup found by Adam P. Goucher .[13] Many stator variants have been found since, mostly by Charity Engine .
See also
References
↑ Robert Wainwright (October 1972). Lifeline , vol 6 , page 3.
↑ Dean Hickerson 's oscillator stamp collection . Retrieved on March 14, 2020.
↑ "Class 2 Objects Catalog ". Retrieved on March 14, 2009.
↑ iNoMed (January 9, 2021). Message in #bots-and-mute-this on the Conwaylife Lounge Discord server
↑ David Raucci (December 11, 2029). Updated oscillator stamp collection (was: Re: Golly suggestions) (discussion thread) at the ConwayLife.com forums
↑ Mark D. Niemiec (November 27, 2016). Re: Help with names (discussion thread) at the ConwayLife.com forums
↑ praosylen (November 24, 2016). Re: Soup search results (discussion thread) at the ConwayLife.com forums
↑ Apple Bottom (June 18, 2017). Re: Soup search results (discussion thread) at the ConwayLife.com forums
↑ Luka Okanishi (November 25, 2016). Re: Soup search results (discussion thread) at the ConwayLife.com forums
↑ Jeremy Tan (January 6, 2020). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
↑ praosylen (September 28, 2020). Re: Soup search results (discussion thread) at the ConwayLife.com forums
↑ Dave Greene (September 28, 2020). Message in #cgol on the Conwaylife Lounge Discord server
↑ Jiahao Yu (January 9, 2021). Re: Soup search results (discussion thread) at the ConwayLife.com forums
External links
Mark D. Niemiec. Re: Soup search results (discussion thread) at the ConwayLife.com forums (burloaferimeter variants)