Bookends

	Bookends
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	<html><div class="rle"><div class="codebox"><div style="display:none;"><code></html>x = 7, y = 4, rule = B3/S23 2o3b2o$obobobo$2bobo$b2ob2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C Still life <nowiki></nowiki> <html></code></div></div><canvas width="200" height="300" style="margin-left:1px;"><noscript></html> <html></noscript></canvas></div></html>
	View static image
Pattern type	Strict still life
Number of cells	14
Bounding box	7×4
Frequency class	18.7
Discovered by	Unknown
Year of discovery	Unknown
[show]Rules
Outer-totalistic rules	B/S23 – B378/S012345678
Important rules	Conway Life
# of rules	210 = 1024
Isotropic rules	B/S2aek3nr – B2in34-i5-jq6-i78/S012345678
[show] Glider synthesis
Fewest gliders	4
Catagolue-generated RLE	bookends_synth.rle
Uploaded synthesis RLE	bookends_synth.rle
[show] Pattern files
Plaintext	bookends.cells
RLE	bookends.rle
[show]Identifiers
apgcode	xs14_39e0e93
Niemiec ID	14.590
Pentadecathlon ID	14.112

Bookends (or cis-mirrored hook) is a still life composed of two bookends.

Commonness

Bookends is the forty-sixth most common still life in Achim Flammenkamp's census, being less common than dead spark coil but more common than elevener.[1] It is also the fifty-third most common object on Adam P. Goucher's Catagolue.[2]

gollark: Hmm. Interesting, I think this is one of those conflict-between-different-decision-theories situations.

gollark: <@435756251205468160> bad, as ever.

gollark: A GEORGE frame?

gollark: (except then you actually have to have situations in which you cooperate)

gollark: (the """"obvious"""" way is to make your decisions depend on unreasonable amounts of data to make the models worse)

Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on January 15, 2009.
Adam P. Goucher. "Statistics". Catagolue. Retrieved on June 24, 2016.

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