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x = 7, y = 4, rule = B3/S23 2o3b2o$obobobo$2bobo$b2ob2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C Still life
Pattern type Strict still life
Number of cells 14
Bounding box 7×4
Frequency class 18.7
Discovered by Unknown
Year of discovery Unknown

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


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]

See also


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

External links