:101 (p5) Found by Achim Flammenkamp in August 1994. The name was suggested by Bill Gosper, noting that the phase shown below displays the period in binary.
:119P4H1V0 (c/4 orthogonally, p4) A spaceship discovered by Dean Hickerson in December 1989, the first spaceship of its kind to be found. Hickerson then found a small tagalong for this spaceship which could be attached to one side or both. These three variants of 119P4H1V0 were the only known c/4 orthogonal spaceships until July 1992 when Hartmut Holzwart discovered a larger spaceship, 163P4H1V0.
:1-2-3 (p3) Found by Dave Buckingham, August 1972. This is one of only three essentially different p3 oscillators with only three cells in the rotor. The others are stillater and cuphook.
..OO...... O..O...... OO.O.OO... .O.O..O... .O....O.OO ..OOO.O.OO .....O.... ....O..... ....OO.... |
:1-2-3-4 (p4) See also Achim's p4.
.....O..... ....O.O.... ...O.O.O... ...O...O... OO.O.O.O.OO O.O.....O.O ...OOOOO... ........... .....O..... ....O.O.... .....O..... |
:135-degree MWSS-to-G The following converter, discovered by Matthias Merzenich in July 2013. It accepts an MWSS as input, and produces an output glider traveling at a 135-degree angle relative to the input direction.
......OO...... ......O.O.OO.O ........O.O.OO ........OO.... .............. .............. .OOOOO.....OO. O....O.....OO. .....O........ O...O......... ..O........... |
:14-ner = fourteener
:17c/45 spaceship A spaceship travelling at seventeen forty-fifths of the speed of light. This was the first known macro-spaceship speed. See Caterpillar for details.
:180-degree kickback The only other two-glider collision besides the standard kickback that produces a clean 180-degree output glider. It is occasionally useful in glider synthesis, but is rarely used in signal circuitry or in self-supporting patterns like the Caterpillar or Centipede, because 90-degree collisions are generally much easier to arrange.
.O. O.. OOO ... ... .OO O.O ..O |
:(23,5)c/79 The rate of travel of the Herschel climber reaction used in the self-supporting waterbear knightship.
:(23,5)c/79 Herschel climber The following glider-supported reaction used in the waterbear, which can be repeated every 79 ticks, moving the Herschel 23 cells to the right and 5 cells upward, and releasing two gliders to the northwest and southwest. As the diagram shows, it is possible to substitute a loaf or other still lifes for some or all of the support gliders. This fact is used to advantage at the front end of the waterbear spaceship.
:24-cell quadratic growth A 39786x143 quadratic growth pattern found by Michael Simkin in October 2014, two days after 26-cell quadratic growth and a week before switch-engine ping-pong.
:25-cell quadratic growth A 25-cell quadratic growth pattern found by Michael Simkin on October 2014, with a bounding box of 21372x172. It was the smallest-population quadratic growth pattern for two days, until the discovery of 24-cell quadratic growth. It superseded 26-cell quadratic growth, which had held the record for eight years.
:25P3H1V0.1 (c/3 orthogonally, p3) A spaceship discovered by David Bell, with a minimum of 25 cells -- the lowest number of cells known for any c/3 spaceship. See also edge-repair spaceship for a very similar c/3 spaceship with a minimumm population of 26.
..........O..... ........OOO.OOO. .......OO......O ..O...O..O...OO. .OOOO........... O...O........... .O.O..O......... .....O.......... |
:25P3H1V0.2 (c/3 orthogonally, p3) A spaceship discovered by Dean Hickerson in August 1989. It was the first c/3 spaceship to be discovered. In terms of its 25 cells, it is tied with 25P3H1V0.1 as the smallest c/3 spaceship. Unlike 25P3H1V0.1, it has a population of 25 in all of its phases, as well as a smaller bounding box.
.......OO.O..... ....OO.O.OO.OOO. .OOOO..OO......O O....O...O...OO. .OO............. |
:26-cell quadratic growth a quadratic growth pattern found by Nick Gotts in March 2006, using ideas found in metacatacryst and Gotts dots. It held the record for the smallest-population quadratic growth pattern for eight years, until it was surpassed by 25-cell quadratic growth.
:295P5H1V1 (c/5 diagonally, p5) The first spaceship of its type to be discovered, found by Jason Summers on 22 November 2000.
:2c/3 Two thirds of the speed of light -- the speed of signals in a 2c/3 wire, or of some against the grain negative spaceship signals in the zebra stripes agar.
:2c/3 wire A wire discovered by Dean Hickerson in March 1997, using his dr search program. It supports signals that travel through the wire diagonally at two thirds of the speed of light.
Considerable effort has been spent on finding a signal elbow for a 2c/3 signal, since this would by one way to prove Life to be omniperiodic. There is a known 2c/3 wire elbow that is usable in some situations, but it has the drawback that it produces two output signals for each input signal, and so unfortunately can not be used to complete a loop.
In 2017 Martin Grant observed that the 2c/3 signal can be split successfully into two half-signals that can be separated from each other by an arbitrary number of ticks.
:2c/5 spaceship A spaceship travelling at two fifths of the speed of light. The only such spaceships that are currently known travel orthogonally. Examples include 30P5H2V0, 44P5H2V0, 60P5H2V0, and 70P5H2V0. At the time of this writing (August 2017) only 30P5H2V0 and 60P5H2V0 have known glider synthesis recipes.
:2c/7 spaceship A spaceship travelling at two sevenths of the speed of light. The only such spaceships that are currently known travel orthogonally. The first to be found was the weekender, found by David Eppstein in January 2000. See also weekender distaff.
:2 eaters = two eaters
:30P5H2V0 (2c/5 orthogonally, p5) A spaceship discovered by Paul Tooke on 7 December 2000. With just 30 cells, it is currently the smallest known 2c/5 spaceship. A glider synthesis for 30P5H2V0 was found by Martin Grant in January 2015, based on a predecessor by Tanner Jacobi.
....O........ ...OOO....... ..OO.OO...... ............. .O.O.O.O..O.. OO...O...OOO. OO...O......O ..........O.O ........O.O.. .........O..O ............O |
:31c/240 The rate of travel of the 31c/240 Herschel-pair climber reaction, and Caterpillar-type spaceships based on that reaction. Each Herschel travels 31 cells orthogonally every 240 ticks.
:31c/240 Herschel-pair climber The mechanism defining the rate of travel of the Centipede and shield bug spaceships. Compare pi climber. It consists of a pair of Herschels climbing two parallel chains of blocks. Certain spacings between the block chains allow gliders from each Herschel to delete the extra ash objects produced by the other Herschel. Two more gliders escape, one to each side, leaving only an exact copy of the original block chains, but shifted forward by 9 cells:
:3c/7 spaceship A spaceship travelling at three sevenths of the speed of light. The only such spaceships that are currently known travel orthogonally. The first to be found was the spaghetti monster, found by Tim Coe in June 2016.
:44P5H2V0 (2c/5 orthogonally, p5) A spaceship discovered by Dean Hickerson on 23 July 1991, the first 2c/5 spaceship to be found. Small tagalongs were found by Robert Wainwright and David Bell that allowed the creation of arbitrarily large 2c/5 spaceships. These were the only known 2c/5 spaceships until the discovery of 70P5H2V0 in December 1992.
....O.....O.... ...OOO...OOO... ..O..O...O..O.. .OOO.......OOO. ..O.O.....O.O.. ....OO...OO.... O....O...O....O .....O...O..... OO...O...O...OO ..O..O...O..O.. ....O.....O.... |
:45-degree LWSS-to-G = 45-degree MWSS-to-G.
:45-degree MWSS-to-G The following small converter, which accepts an MWSS or LWSS as input and produces an output glider traveling at a 45-degree angle relative to the input direction.
:4-8-12 diamond The following pure glider generator.
....OOOO.... ............ ..OOOOOOOO.. ............ OOOOOOOOOOOO ............ ..OOOOOOOO.. ............ ....OOOO.... |
:4 boats (p2)
...O.... ..O.O... .O.OO... O.O..OO. .OO..O.O ...OO.O. ...O.O.. ....O... |
:4F = Fast Forward Force Field. This term is no longer in common use.
:56P6H1V0 (c/6 orthogonally, p6) A 56-cell spaceship discovered by Hartmut Holzwart in 2009, the smallest known c/6 orthogonal spaceship as of this writing (August 2017).
:58P5H1V1 (c/5 diagonally, p5) A spaceship discovered by Matthias Merzenich on 5 September 2010. In terms of its minimum population of 58 cells it is the smallest known c/5 diagonal spaceship. It provides sparks at its trailing edge which can perturb gliders, and this property was used to create the first c/5 diagonal puffers. These sparks also allow the attachment of tagalongs which was used to create the first c/5 diagonal wickstretcher in January 2011.
:5c/9 wire A wire discovered by Dean Hickerson in April 1997, using his dr search program. It supports signals that travel through the wire diagonally at five ninths of the speed of light.
:60P5H2V0 (2c/5 orthogonally, p5) A 60-cell spaceship discovered by Tim Coe in May 1996. It was the first non-c/2 orthogonal spaceship to be successfully constructed via glider synthesis.
:67P5H1V1 (c/5 diagonally, p5) A spaceship discovered by Nicolay Beluchenko in July 2006. It was the smallest known c/5 diagonal spaceship until the discovery of 58P5H1V1 in September 2010.
:70P5H2V0 (2c/5 orthogonally, p5) A spaceship discovered by Hartmut Holzwart on 5 December 1992.
:7x9 eater a high-clearance eater5 variant that can suppress passing gliders in tight spaces, such as on the inside corner of an R64 Herschel conduit. Like the eater5 and sidesnagger, the 7x9 eater is able to eat gliders coming from two directions, though this ability is not commonly used.
:86P5H1V1 (c/5 diagonally, p5) A spaceship discovered by Jason Summers on January 8, 2005. It was the smallest known c/5 diagonal spaceship until the discovery of 67P5H1V1 in July 2006.
:90-degree kickback See kickback.
:9hd separated by 9 half diagonals. Specifically used to describe the distance between the two construction lanes in the linear propagator.