Burloaferimeter

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Burloaferimeter
4b2o4b$5bo4b$4bo5b$3bob3o2b$3bobo2bob$2obo3bobo$2obo4bob$4b4o2b2$4b2o 4b$4b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ ZOOM 32 GPS 3 HEIGHT 480 WIDTH 480 ]]
Pattern type Oscillator
Oscillator type Billiard table
Number of cells 28
Bounding box 10×11
Period 7
Mod 7
Heat 1.4
Volatility 0.16
Strict volatility 0.16
Discovered by David Buckingham
Year of discovery 1972

Burloaferimeter is a period-7 oscillator that was found by David Buckingham in 1972.[1] 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.[2] In terms of bounding box, the outright winner is an 11×9 burloaferimeter stator variant.[3]

Etymology

According to Mark D. Niemiec[4], 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

C4_4-symmetric quadruple burloaferimeter variant found by Park Shinhwan on Catagolue in November 2016.[5]
View animated image.
RLE: here
Catagoluehere
C4_4-symmetric quadruple burloaferimeter variant found by Apple Bottom on Catagolue on June 16 2017.[6]
View animated image.
RLE: here
Catagoluehere

A 28-glider synthesis for the variant on the left was discovered by Luka Okanishi shortly after,[7] and was improved to 24 gliders by Jeremy Tan on January 5, 2020.[8]

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.[9] A 12-glider synthesis based on this soup was found soon afterwards due to contributions by various users on Discord.[10] A second burloaferimeter variant occurred on January 9, 2021, in a soup found by Adam P. Goucher.[11]

See also

References

  1. Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.
  2. "Class 2 Objects Catalog". Retrieved on March 14, 2009.
  3. iNoMed (January 9, 2021). Message in #bots-and-mute-this on the Conwaylife Lounge Discord server
  4. Mark D. Niemiec (November 27, 2016). Re: Help with names (discussion thread) at the ConwayLife.com forums
  5. Aidan F. Pierce (November 24, 2016). Re: Soup search results (discussion thread) at the ConwayLife.com forums
  6. Apple Bottom (June 18, 2017). Re: Soup search results (discussion thread) at the ConwayLife.com forums
  7. Luka Okanishi (November 25, 2016). Re: Soup search results (discussion thread) at the ConwayLife.com forums
  8. Jeremy Tan (January 6, 2020). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
  9. Aidan F. Pierce (September 28, 2020). Re: Soup search results (discussion thread) at the ConwayLife.com forums
  10. Dave Greene (September 28, 2020). Message in #cgol on the Conwaylife Lounge Discord server
  11. yujh (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)