Jolson

	Jolson
	<html><div class="rle"><div class="codebox"><div style="display:none;"><code></html>x = 13, y = 19, rule = B3/S23 b2o6b2o$o2bo4bo2bo$o2bo4bo2bo$o2bo4bo2bo$b2o6b2o3$7bo$5bo2bob2o$6b2o2b 2o3$6b4o$5b6o$4b8o$3b2o6b2o$4b8o$5b6o$6b4o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] <nowiki>#C [[ GPS 3 ZOOM 12 LOOP 15 ]]</nowiki> <html></code></div></div><canvas width="200" height="300" style="margin-left:1px;"><noscript></html> <html></noscript></canvas></div></html>
	<html><div class="rle"><div class="codebox"><div style="display:none;"><code></html>x = 13, y = 19, rule = B3/S23 b2o6b2o$o2bo4bo2bo$o2bo4bo2bo$o2bo4bo2bo$b2o6b2o3$7bo$5bo2bob2o$6b2o2b 2o3$6b4o$5b6o$4b8o$3b2o6b2o$4b8o$5b6o$6b4o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] <nowiki>#C [[ GPS 3 ZOOM 12 LOOP 15 ]]</nowiki> <html></code></div></div><canvas width="200" height="300" style="margin-left:1px;"><noscript></html> <html></noscript></canvas></div></html>
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Pattern type	Oscillator
Number of cells	42
Bounding box	18×22
Period	15
Mod	15
Heat	47.9
Volatility	0.98
Strict volatility	0.98
Discovered by	Robert Wainwright
Year of discovery	1984
Rules
Outer-totalistic rules	B3/S23 – B3/S023
Important rules	Conway Life
# of rules	21 = 2
Isotropic rules	B3-ky/S23-ckr – B34cnt5-eiy6-ik7c/S0234cjkqyz5cekr6-ck
Glider synthesis
Fewest gliders	13
Catagolue-generated RLE	jolson_synth.rle
Uploaded synthesis RLE	jolson_synth.rle
Pattern files
Plaintext	jolson.cells
RLE	jolson.rle
Identifiers
apgcode	xp15_3v3y64r4z9g9y0jjy04r4zcfcy011
Pentadecathlon ID	42P15.1

Jolson (also known as Al Jolson[note 1]) is a period-15 oscillator consisting of two blocks hassled by two pentadecathlons. It was found by Robert Wainwright in November 1984[1] and named by Bill Gosper.

The hassling mechanism requires two domino sparks, constantly 3 generations apart, provided by sparkers of period 9 or above (e.g. Merzenich's p31). A period 9 version that uses two snackers is possible (see below), but p14 (with tetradecathlons) is impossible.[2]

Image gallery

The period 9 version of Jolson
Download RLE: click here

One of the phases of Jolson, which led to its name

Notes

The name is a reference to Al Jolson, a famous American singer.

gollark: Really?

gollark: ↑ certain LyricTech™ entities

gollark: https://media.discordapp.net/attachments/772689152234749962/863806804164345856/ufo3.png?width=422&height=422

gollark: No, they're just really bad, like all LyricTech™'s other hardware. Have you seen their apinators? Mere *hectobees* per second.

gollark: It's not what LyricTech™ would like to think. They'd *like* to think they're cool and amazing, but are actually bad.

References

Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.
Mark Niemiec (August 14, 2019). Re: Oscillator Discussion Thread (discussion thread) at the ConwayLife.com forums

External links

Jolson at the Life Lexicon

Jolson at Adam P. Goucher's Catagolue

42P15.1 at Heinrich Koenig's Game of Life Object Catalogs

This article is issued from Conwaylife. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.

[1] The name is a reference to Al Jolson, a famous American singer.

[2] Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.

[post81227-3] Mark Niemiec (August 14, 2019). Re: Oscillator Discussion Thread (discussion thread) at the ConwayLife.com forums