Thread for basic questions

[qqd]

B2a/S2k is a rule which simulates another rule every 2 ticks. In the emulated rule, all patterns are replicators, and you can emulate it by diagonally placing 2x2 blocks, which are the unit cells:

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x = 24, y = 9, rule = B2a/S2k
9bo$16b2o2b2o$11bo4b2o2b2o$bo20b2o$2bo2bobobobobo8b2o$3o17b2o$11bo8b2o
$18b2o$9bo8b2o!

In that particular example, the resulting pattern is a replicator both in the original and emulated rules:

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x = 8, y = 8, rule = B2a/S2k
2o2b2o$2o2b2o$6b2o$6b2o$4b2o$4b2o$2b2o$2b2o!

Now, for the question: What is the rule table of the emulated rule?

[azulavoir]

Now, for the question: What is the rule table of the emulated rule?

Isn't it just B13/S in the von Neumann neighborhood?

[unname4798]

Now, for the question: What is the rule table of the emulated rule?

Isn't it just B13/S in the von Neumann neighborhood?

B13/S13V.

[qqd]

Now, for the question: What is the rule table of the emulated rule?

Isn't it just B13/S in the von Neumann neighborhood?

B13/S13V.

Nope, it doesn't work in the exact same way, I checked it for my example.

[azulavoir]

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x = 4, y = 6, rule = B2a/S2k
2o$2o$4o$4o$2o$2o!

Since diagonal cells are all that's allowed for it to work, every living VN cell has exactly 0 neighbors anyway, so the survival conditions can be whatever you want besides S0V.

[Haycat2009]

Are there any Herschel crawler reactions where the glider is fired from the same direction as the (23,5) c/79 crawler and the Herschel moves in the same overall direction but NOTHING is produced except for the Herschel itself, not even a extra glider?

[Anivec]

Is there a rating system for partials that tells how hard it is to complete? This system could be used for both oscillator partials and conduits

[confocaloid]

Is there a rating system for partials that tells how hard it is to complete?

When I saw the question I first thought about spaceship partials. (Sir Robin was subdivided as 62% + 38%, but probably there was no simpler way to predict/approximate that from the partial without completing it?)

For conduits, Tutorials/Finding_conduits#Asking_for_help has some suggestions, but again no actual rating system.

[TYCF]

What does a transition mean?

[azulavoir]

A transition is when a cell changes from one state to another. It can also be part of a rule that dictates whether or not the cell will change on a given generation. For example, the B3, S2 and S3 in Life's standard notation are all transitions.

[confocaloid]

What does a transition mean?

A transition is when a cell changes from one state to another. It can also be part of a rule that dictates whether or not the cell will change on a given generation. For example, the B3, S2 and S3 in Life's standard notation are all transitions.

I would say that second meaning is somewhat imprecise. Transitions are events such as B = birth, S = survival, A = abstain (a dead cell that remains dead), D = death, that are given by the previous and new states of a cell.[1]

Things like B3, S2, S3 are conditions under which a certain transition happens (e.g. B3 is a birth condition, S3 is a survival condition, etc.) People often refer to those as "transitions" as well (e.g. "rule 1 transition away from Life"). But it would be clearer to write "rule 1 condition away from Life", and probably clarify whether one means one of 18 conditions expressible in the Life-like cellular automaton notation, or one of 102 conditions expressible in Hensel notation for isotropic rules, or one of 512 3x3 conditions expressible in MAP string notation, or something beyond 2-state range-1 Moore neighbourhood.

[1] (Edit: see post6321, post25139, post48449 for the use of letters B, S, A, D to define rulespaces.)

[qqd]

Have any searches been done to find constellations that, when hit by a glider or another signal, which give an output and get displaced by some amount?

[dvgrn]

Have any searches been done to find constellations that, when hit by a glider or another signal, which give an output and get displaced by some amount?

Yes, occasionally, but not recently. I think the current status is still pretty much the same as it was when a similar question came up on this thread six years ago.

I don't think that the various octohash databases have even been checked for interesting coincidences along these lines. That would be time-consuming -- possible but not trivial, since the octohash fingerprint format doesn't care about outputs, so you have to do some kind of automated output removal and re-recognition before you'd recognize that the output constellation was the same as the original constellation -- and then you'd have to check orientation.

[HerscheltheHerschel]

Is there a catalyst that can turn a spark such as a dot/domino/banana into a glider?

[C28]

Is there a catalyst that can turn a spark such as a dot/domino/banana into a glider?

theoretically yes, but a high repeat time would be guaranteed.

[dvgrn]

Is there a catalyst that can turn a spark such as a dot/domino/banana into a glider?

theoretically yes, but a high repeat time would be guaranteed.

That's definitely true if "high repeat time" means "at least 14 ticks". It doesn't seem like there are any guarantees for repeat times above that.

[confocaloid]

Is there a catalyst that can turn a spark such as a dot/domino/banana into a glider?

Although not a single strict still life catalyst, several solutions were posted in thread viewtopic.php?f=2&t=5821

[HerscheltheHerschel]

Are there any practical uses for the lemon/loaf siamese loaf?

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x = 5, y = 5, rule = B3/S23
2b2o$bo2bo$obobo$o2bo$b2o!

[Anivec]

This was the most on-topic thread I could find. Where is the thread for digital circuitry?

Here’s the link for digital circuitry
Here’s the link for analog circuitry
And here’s the link for combining circuits

[Timelord Missionary]

I have a bunch of patterns which are all oscillators in my head that I have found by hand, and can draw them easily. Is there a way I can convert a pattern in I’ve drawn on a lifeviewer to an rle besides doing it manually? If it’s any consolation, they’re all original, with only one being old parts put together in a novel way.

[dvgrn]

I have a bunch of patterns which are all oscillators in my head that I have found by hand, and can draw them easily. Is there a way I can convert a pattern in I’ve drawn on a lifeviewer to an rle besides doing it manually? If it’s any consolation, they’re all original, with only one being old parts put together in a novel way.

Ctrl+C in LifeViewer will copy out the RLE-format version of the current pattern. For devices with no keyboard, there's also a standard-looking Copy icon under the Select menu.

[Timelord Missionary]

Sweet! Thanks, dvgrn! Yay! Over-enthusiastic newbie sounds!

[qqd]

Has anyone tried using an infinite number of parallel gliders to represent some real number and then do computation on it?

[epsilon6021023]

Newbie here, I found this 4x4 methuselah about a year ago, and I was just wondering if anyone else had come across it. It has 10 cells and lasts about 4079 generations before stabilizing.

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x = 4, y = 4, rule = B3/S23
b2o$o2bo$4o$obo!

[TYCF]

What would this type of pattern called?

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x = 376, y = 59, rule = B3/S23
56b2o260b2o$56b2o260b2o2$78bo218bo$78bobo214bobo$81b2o6b2o194b2o6b2o$
38b2o27b2o12b2o4bo3bo192bo3bo4b2o12b2o27b2o$38b2o16b3o8b2o12b2o3bo5bo
8b2o170b2o8bo5bo3b2o12b2o8b3o16b2o$78bobo4b2obo3bo8b2o170b2o8bo3bob2o
4bobo$56bobo19bo7bo5bo190bo5bo7bo19bobo$55b5o27bo3bo192bo3bo27b5o$54b
2o3b2o4b2o22b2o194b2o22b2o4b2o3b2o$54b2o3b2o3bo2bo11bo216bo11bo2bo3b2o
3b2o$64bo12b2o218b2o12bo$64bo13b2o216b2o13bo$64bob2o240b2obo$66b2o240b
2o2$83b2o206b2o$59b2o4b2o15b2o10bobo182bobo10b2o15b2o4b2o$59bo5b2o17b
o8bo2bo182bo2bo8bo17b2o5bo$60b3o16b2o11b2o10b2o164b2o10b2o11b2o16b3o$
62bo16bobo8b2o3bo8b2o164b2o8bo3b2o8bobo16bo$74b2o6bo9b2o5b2o174b2o5b2o
9bo6b2o$73bo2bo2bo2bo10bo2bo4bo172bo4bo2bo10bo2bo2bo2bo$73b3o6bo11bob
o182bobo11bo6b3o$46b3o22b3o5bobo212bobo5b3o22b3o$48bo15bo5bobo6b2o214b
2o6bobo5bo15bo$47bo14b2o6bo234bo6b2o14bo$63b2o4b2o234b2o4b2o$55bo264b
o$35b2o17bobo262bobo17b2o$35bo18b2obo14b2o228b2o14bob2o18bo$24bo8bobo
18b2ob2o14bo228bo14b2ob2o18bobo8bo$24b4o5b2o19b2obo15bobo10bo202bo10b
obo15bob2o19b2o5b4o$8bo16b4o15b2o8bobo4b2o11b2o9b4o198b4o9b2o11b2o4bo
bo8b2o15b4o16bo$7bobo5b2o8bo2bo14bobo9bo5bobo7bo12b2ob4o5b2o180b2o5b4o
b2o12bo7bobo5bo9bobo14bo2bo8b2o5bobo$5b2o3bo14b4o14bo19bo6b2o11b3ob2o
3bo3bo2bo176bo2bo3bo3b2ob3o11b2o6bo19bo14b4o14bo3b2o$2o3b2o3bo4bobob2o
3b4o14b2o19b2o5bobo11b2ob2o3bo7bo174bo7bo3b2ob2o11bobo5b2o19b2o14b4o3b
2obobo4bo3b2o3b2o$2o3b2o3bo5b2o3bo2bo60b5o3bo6bo6b2o158b2o6bo6bo3b5o60b
o2bo3b2o5bo3b2o3b2o$7bobo10bo18b2o45bo3b3o7bo6b2o158b2o6bo7b3o3bo45b2o
18bo10bobo$8bo8bo2bo10b3o4bobo27b2o26bo2bo176bo2bo26b2o27bobo4b3o10bo
2bo8bo$33bo3b3o28bo2bo24b2o180b2o24bo2bo28b3o3bo$32bo4b2o298b2o4bo$40b
2o26bo2bo12bo206bo12bo2bo26b2o$27bo11b3o25bo2bo11b2o208b2o11bo2bo25b3o
11bo$28bo38bobo12b3o206b3o12bobo38bo$28bo39bo11b3o210b3o11bo39bo$24bo
2bo11b2o39b2o212b2o39b2o11bo2bo$6bo5b2o9bo15b2o27b2o236b2o27b2o15bo9b
2o5bo$4bo3bo3b3o10bo42b2o16b2o9bo180bo9b2o16b2o42bo10b3o3bo3bo$8bo5b2o
bo11bo55b4o7bobo178bobo7b4o55bo11bob2o5bo$3bo5bo4bo2bo10b2o50bobo2bo2b
3o5b2obo176bob2o5b3o2bo2bobo50b2o10bo2bo4bo5bo$3b2o9b2obo9b2o4b2o2b2o
40bo2bo2b2o9b2ob2o3b2o164b2o3b2ob2o9b2o2bo2bo40b2o2b2o4b2o9bob2o9b2o$
12b3o11b3o4b2o2b2o31b2o6b2o9bo6b2obo4b2o164b2o4bob2o6bo9b2o6b2o31b2o2b
2o4b3o11b3o$12b2o13b2o4b2o35b2o4b2o3bo8bo5bobo178bobo5bo8bo3b2o4b2o35b
2o4b2o13b2o$28b2o48b2o10bo6bo180bo6bo10b2o48b2o$29bo49bo2bo210bo2bo49b
o$80bobo210bobo!