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Pyry Virtanen wrote: August 8th, 2022, 10:53 am Does anyone know if there is a database or a collection for small diehards available online? By 'small' I mean patterns with initial population at most 20 or so and a bounding box at most 10x10 or so. Preferably with long lifespans. I have been trying to find patterns like these from Catagolue soups (mostly C1) with some success, but it seems to be tough to find diehards with these size limits and a lifespan of more than 200. The best one I have found so far is a 889-tick diehard that has 18 cells and a 8x9 bounding box, which I posted yesterday in the Unsure Discoveries thread. Can someone find a better one?

x = 11, y = 47, rule = B3/S23
2o6b2o$obo5b2o$b2o2$bo$2o$obo33$10bo$2o6b3o$obo4bo$b2o4b2o2$bo$2o$obo!
#C [[ ZOOM 4 ]]

x = 65, y = 60, rule = B3/S23
5b2o53b2o$b2o2b2o47b2o3bo2bo$b2o51b2o4b2o2$9bo$8bobo42b2o4bo$8bobo42b
2o3bobo$bo7bo48bobo2b2o$obo56bo2b2o$obo61bo$bo2b3o$4bo$5bo35$54b2o2b2o
$7bo46b2o2b2o$2o4bobo$2o4bobo$7bo2$3b2o57b2o$3b2o2b2o49b2o2b2o$7b2o49b
2o$63bo$9bo52b2o$8b2o52bobo$8bobo!
#C [[ ZOOM 4 ]]

Wyirm wrote: August 16th, 2022, 10:00 am Are there any one glider seeds of themselves which output gliders? In other words, a "stable" crawler.

x = 11, y = 13, rule = B3/S23
9bo$8bo$8b3o4$4b2o$3bo2bo$3bobo$b2obo$o2bo$obo$bo!

Wyirm wrote: August 16th, 2022, 11:01 am I forgot about the hbk and its variants, Thank you!

x = 8, y = 8, rule = B3/S23
2bo$obo$b2o3b2o$6b2o3$5b2o$5b2o!

x = 80, y = 78, rule = B3/S23
78bo$77bo$77b3o67$2o5b2o$2o5b2o5$2o7b3o$2o7bo$10bo!

AlbertArmStain wrote: August 16th, 2022, 3:40 pm Does someone know were to find slow-salvos for this wild bunch...

Book wrote: August 18th, 2022, 7:16 pm I'm looking for a good definition of stabilize/stabilization. The term is used all over the place, we all know what we mean by it, but I have not come across a well-thought-out definition.

x = 22, y = 25, rule = LifeHistory
9.2E$9.2E5.2E$16.2E3$14.2C$14.2C$20.2E$20.2E4$A$A.A$3A$2.A7$12.3D$12.
D$11.2D!

GUYTU6J wrote: August 19th, 2022, 5:31 am In my words: to stabilize a pattern P is to interact it with one or more patterns, stabilization/stabilizer S, so that after converging to a <s>periodic</s> predictable pattern P' a specific trait T1 is preserved and another trait T2 that defies T1 is removed...

Coban wrote: August 19th, 2022, 3:55 pm How are new oscillators usually found?
Is it mainly by manual exploration and exhaustive search with apgsearch ?
Or are there dedicated tools ?

(was not sure if it's a question for here or the oscillator thread)

dvgrn wrote: August 19th, 2022, 4:45 pm There are now several dedicated tools, some of which are variants of others, like symmetric CatForce and various versions of hotdogPi's spark search script.

Looks like you joined the ConwayLife Lounge Discord server today. That's where a lot of the plotting and planning and custom adjusting of search scripts tends to go on these days (in the #tools channel, mostly, I think, with results reported in #cgol).

Book wrote: August 20th, 2022, 6:38 pm Anyone have an rle for the boat cis-line tub induction coil?

x = 7, y = 4, rule = B3/S23
2b3o$bo3bo$obobobo$bo3b2o!

hotdogPi wrote: August 20th, 2022, 8:14 pm

Book wrote: August 20th, 2022, 6:38 pm Anyone have an rle for the boat cis-line tub induction coil?

This is the only thing it could be.

Code: Select all

x = 7, y = 4, rule = B3/S23
2b3o$bo3bo$obobobo$bo3b2o!

Book wrote: August 18th, 2022, 7:16 pm I'm looking for a good definition of stabilize/stabilization. The term is used all over the place, we all know what we mean by it, but I have not come across a well-thought-out definition.

GUYTU6J wrote: August 19th, 2022, 5:31 am In my words: to stabilize a pattern P is to interact it with one or more patterns, stabilization/stabilizer S, so that after converging to a <s>periodic</s> predictable pattern P' a specific trait T1 is preserved and another trait T2 that defies T1 is removed...

dvgrn wrote: August 19th, 2022, 8:46 am That's one meaning of stabilize -- the "engineering" meaning, applied to moving or oscillating patterns.

There's also the very common "stabilizes at time T", which usually means "settles into stationary ash plus optional spaceships escaping to infinity on non-interacting paths" ... but occasionally means "evolves to a configuration where all future stages of the pattern can be predicted accurately without evolving the pattern any further."

• The "settles into stationary ash plus optional spaceships escaping to infinity on non-interacting paths" meaning is discussed in CGoLM&C 1.6 Methuselahs and Stability. In particular, there is a footnote there, saying

We will see shortly that properly defining what it means for a pattern to "stabilize" is very troublesome, but for now it just means that the pattern has broken down into non-interacting still lifes, oscillators, and spaceships.

• The "evolves to a configuration where all future stages of the pattern can be predicted accurately without evolving the pattern any further." meaning is also discussed in CGoLM&C 1.6 later, with the example of block-laying switch engine.
• For the different meaning of "stabilize" as applied to unstable patterns stabilized by other patterns, you can find examples in the book. For one example, CGOLM&C 1.3 The Queen Bee has examples of use of words "stabilized"/"stabilize"/"stabilizing" with this meaning, starting from text "The queen bee can also be stabilized by some objects other than blocks..."
• Yet another meaning of "stable" appears in "stable reflector", "stable conduit", "stable pattern", meaning that the thing in question is composed of still lifes, i.e. it is p1.

All italicized text is comment and would be removed from a published article. Bold text denotes a relevant terms defined in context and would be redirects to this page.

Stability is the state of a pattern in which all future generations can be predicted accurately without evolving the pattern any further, and the pattern does not die. This includes patterns which evolve to stationary ash and optional spaceships escaping to infinity on non-interacting paths. Such a pattern is said to be stable. This supersedes the notion that stable=still life.

dl-rs wrote: August 22nd, 2022, 2:29 am Is there any real usages of cellar automata? My mom wants to write something to a magazine to like add some glory.