Cis-boat up on long bookend

Cis-boat up on long bookend
x = 5, y = 7, rule = B3/S23 2bo$bobo$2b2o2$4o$o3bo$3b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 3 ZOOM 21 HEIGHT 400 SUPPRESS ]]
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Pattern type	Strict still life
Number of cells	13
Bounding box	5 × 7
Frequency class	24.1
Static symmetry	Unspecified
Discovered by	Unknown
Year of discovery	Unknown
Rules Outer-totalistic rules B/S23 – B3678/S012345678 # of rules 211 = 2048 Isotropic rules B/S2-n3nr – B2ikn34-ain5-cqr678/S012345678
Glider synthesis Fewest gliders 4 Catagolue-generated RLE synthesis
Pattern files Plaintext cisboatuponlongbookend.cells RLE cisboatuponlongbookend.rle
Identifiers apgcode xs13_3hu06a4 Niemiec ID 13.35 Pentadecathlon ID 13.60

Cis-boat up on long bookend is a 13-cell still life.

Construction

This still life can be constructed with 4 gliders. A 4-glider synthesis was found in August 2014.

x = 40, y = 20, rule = B3/S23 4bo$2bobo$3b2o15bo$18b2o$19b2o$38b2o$35bo3bo$35b4o2$37b2o$36bobo$37bo 2$3o$2bo$bo2$28bo$27b2o$27bobo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THEME Book ZOOM 10 AUTOSTART GPS 12 T 0 PAUSE 1 T 16 PAUSE 3 T 82 PAUSE 2 LOOP 83 ]] A 4G synthesis (click above to open LifeViewer)

x = 37, y = 30, rule = B3/S23 2bo$3bo$b3o5$9bo$10bo$8b3o4$35b2o$32bo3bo$32b4o2$34b2o$21b2o10bobo$21b obo10bo$21bo$b2o$obo$2bo4$23b2o$22b2o$24bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ HEIGHT 400 THEME Book ZOOM 10 AUTOSTART GPS 12 T 0 PAUSE 1 T 16 PAUSE 3 T 26 PAUSE 1 T 40 PAUSE 2 LOOP 41 ]] A 5G synthesis (click above to open LifeViewer)

Occurrence

See also: List of common still lifes

This is the 171st most common still life on Adam P. Goucher's Catagolue.

This still life occurs in the ash of one collision from the octohash database. There are also two collisions in the octo3obj database with this still life in the final pattern.

Isomers

This still life is comprised of the normally stable boat acting to stabilise the normally unstable long bookend, an induction coil. This is one of four possible isomers, named cis due to the boat not extending past the side of the bookend, and up, due to the boat being closer to the dense part of the bookend; the other cis isomer, cis-boat down on long bookend, is farther from the dense part of the bookend, and the other two isomers, trans-boat up on long bookend and trans-boat down on long bookend, extend past the sides of the bookend (hence trans).

External links

• Cis-boat up on long bookend at Adam P. Goucher's Catagolue
• 13.60 at Heinrich Koenig's Game of Life Object Catalogs
• The 240 thirteen-bit still-lifes at Mark D. Niemiec's Life Page (download pattern file: 13/13-35.rle)