Cis-boat down on long bookend

Cis-boat down on long bookend
x = 5, y = 7, rule = B3/S23 bo$obo$2o2$4o$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	24.3
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 cisboatdownonlongbookend.cells RLE cisboatdownonlongbookend.rle
Identifiers apgcode xs13_2530fho Niemiec ID 13.36 Pentadecathlon ID 13.92

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

Construction

This still life can be constructed with 4 gliders. A 5-glider synthesis was found in 2014. A 4-glider synthesis was found in July 2015.

x = 32, y = 24, rule = B3/S23 7bo$5bobo$6b2o8$30b2o$27bo3bo$27b4o2$27b2o$3o12b3o9bobo$2bo12bo12bo$bo14bo4$bo$b2o$obo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THEME Book ZOOM 10 AUTOSTART GPS 12 T 0 PAUSE 1 T 20 PAUSE 3 T 30 PAUSE 2 LOOP 31 ]] A 4G synthesis (click above to open LifeViewer)

x = 38, y = 32, rule = B3/S23 2bo$obo$b2o2$4bo$5b2o$4b2o6$21bo$19b2o$20b2o$36b2o$33bo3bo$33b4o2$33b 2o$33bobo$34bo6$22b2o$22bobo$22bo8b2o$31bobo$31bo! #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 20 PAUSE 3 T 35 PAUSE 1 T 50 PAUSE 2 LOOP 51 ]] A 5G synthesis (click above to open LifeViewer)

x = 36, y = 58, rule = B3/S23 16bo$14b2o$15b2o7$21bo$10b2ob2o5bo$10b2ob2o5b3o11b2o$31bo3bo$bo29b4o$ 2b2o$b2o28b2o$31bobo$32bo7$16b2o$15b2o$17bo4$15bo$15bobo$15b2o7$bo18bo $2bo7b2ob2o5bobo$3o7b2ob2o5b2o12b2o$31bo3bo$31b4o2$31b2o$31bobo$32bo8$ 4b2o$5b2o$4bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ HEIGHT 600 THEME Book ZOOM 10 AUTOSTART GPS 12 T 0 PAUSE 1 T 20 PAUSE 3 T 31 PAUSE 2 T 35 PAUSE 3 LOOP 36 ]] Four-glider conversions from a bi-block (click above to open LifeViewer)

Occurrence

See also: List of common still lifes, List of still lifes with 13 cells

This is the 182nd most common still life on Adam P. Goucher's Catagolue, and 19th most common 13-cell still life.

This still life does not occur in final patterns of collisions catalogued in octohash, octo3obj or octo3g databases.

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 down, due to the boat being farther from the dense part of the bookend; the other cis isomer, cis-boat up on long bookend, is closer to 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 down on long bookend at Adam P. Goucher's Catagolue
• 13.92 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: 13/13-36.rle)