Thread for basic questions

For general discussion about Conway's Game of Life.
User avatar
wwei47
Posts: 1018
Joined: February 18th, 2021, 11:18 am

Re: Thread for basic questions

Post by wwei47 » July 6th, 2021, 9:50 pm

How do I synthesize this traffic light predecessor? A synthesis would likely imply a final step for a sparker.

Code: Select all

x = 13, y = 5, rule = LifeHistory
3.7D$3.7D$3.3D.3D$5D3A5D$4D5A4D!
Self-proclaimed synthesis "expert"

72c20e
Posts: 62
Joined: June 10th, 2016, 5:52 am

Re: Thread for basic questions

Post by 72c20e » July 7th, 2021, 7:35 am

There are still uncommitted hauls uploaded by apgsearch but not yet included in the census.

What happened?

Code: Select all

x = 15, y = 36, rule = B38/S23-
bo$2bo$3o14$13bo$12bo$12b3o2$11bo$12bo$10b3o4$12b3o$12bo$13bo2$10bo$8b
obo$9b2o$6b2o$5bobo$7bo!

User avatar
dvgrn
Moderator
Posts: 8210
Joined: May 17th, 2009, 11:00 pm
Location: Madison, WI
Contact:

Re: Thread for basic questions

Post by dvgrn » July 7th, 2021, 9:07 am

72c20e wrote:
July 7th, 2021, 7:35 am
There are still uncommitted hauls uploaded by apgsearch but not yet included in the census.

What happened?
Just very recent ones, right? There are always new hauls trickling in to the C1 census.

If you're looking at some symmetry other than C1, then which one specifically? If only one person is searching a symmetry, then hauls tend to pile up for a while since Catagolue doesn't let people self-verify hauls except maybe sometimes in sort-of-emergencies (I forget the exact rules).

pcallahan
Posts: 645
Joined: April 26th, 2013, 1:04 pm

Re: Thread for basic questions

Post by pcallahan » July 8th, 2021, 1:18 pm

Has anyone ever done an enumeration of still lifes with a specific topology? One obvious case consists of loops, or patterns consisting of live cells, connected by adjacency, in which each live cell has exactly 2 live neighbors. These are pretty rare, at least among small patterns, and include tub, beehive, loaf, pond, and mango. Here are two larger examples:

Code: Select all

x = 26, y = 11, rule = B3/S23
20b2o$4bo14bo2bo$3bobo13bo2bo$2bo2bo11b2o4b2o$bo3bobo8bo8bo$o5bobo7bo
8bo$obo5bo8b2o4b2o$bobo3bo11bo2bo$3bo2bo12bo2bo$3bobo14b2o$4bo!
The above are both extensible in an obvious way, though they leave a lot of empty space. Something closer to a space-filling curve would be more interesting. Note that there are many examples of collections of loops that stabilize each other, the smallest being aircraft carrier (I know this because my simple filter doesn't check connected components so there are a lot of these.)

One way to stabilize a chain of cells is to stretch them out so each adjacent empty cell has 2 or fewer neighbors. If you want to pack them closer, you need to make sure every empty cell in the interior has at least 4 neighbors. It reminds me of what little I know about protein or RNA folding. Clearly, it's much simpler.

There are more examples of still lifes with "snake" topology, i.e. a connected chain of live cells with 2 neighbors that's terminated at each end by a triple of mutually adjacent cells (so exactly 2 cells have 3 neighbors and the rest have 2). You can make them just by stretching all the cells into a diagonal, by packing them densely into hairpin turns, or in more convoluted ways:

Code: Select all

x = 40, y = 16, rule = B3/S23
2o$o21bo$bo19bobo11bob2o$2bo15bo2bobo2bo8b2o2bo$3bo13bobobobobobo10bo$
4bo12bobobobobobo7b3o$5bo10b2obobobobob2o5bo$6bo12bobobobo8bob2o$7bo
11bobobobo9bo2bo$8bo11bo3bo12b2o$9bo$10bo$11bo$12bo$13bo$12b2o!
I can't find any really convoluted examples just by filtering the small still life enumeration. I wonder if anyone has tried counting just loops and snake-like patterns. Also if there are general methods for constructing non-obvious snake packings using a recursive method such as used for space-filling curves.

mniemiec
Posts: 1340
Joined: June 1st, 2013, 12:00 am

Re: Thread for basic questions

Post by mniemiec » July 8th, 2021, 2:48 pm

pcallahan wrote:
July 8th, 2021, 1:18 pm
Has anyone ever done an enumeration of still lifes with a specific topology? One obvious case consists of loops, or patterns consisting of live cells, connected by adjacency, in which each live cell has exactly 2 live neighbors. These are pretty rare, at least among small patterns, and include tub, beehive, loaf, pond, and mango. Here are two larger examples: ...
I don't recall anyone having actually done this via computer search, but it is trivial to do by searching for still-lifes in related rule B3/S2. One could similarly restrict survival topologies to searching a non-totalistic rule, replacing S by the list of permitted neighborhoods, and one could similarly restrict birth-suppression topologies by adding additional B neigborhoods. Of course, these only work on a local basis; topologies whose definition is more complicated than just looking at an adjacent neighborhood can't be filtered in this way.

Another way to do all of this (which could work for any topology) is to take an previously-calculated list of still-lifes, and post-process it to filter out any undesired topologies. This is exactly what I used in my still-life searches. E.g. my searcher finds a mixture of still-lifes and pseudo-still-lifes, and I run the result through a filter that separates the two.

pcallahan
Posts: 645
Joined: April 26th, 2013, 1:04 pm

Re: Thread for basic questions

Post by pcallahan » July 8th, 2021, 3:56 pm

mniemiec wrote:
July 8th, 2021, 2:48 pm
Another way to do all of this (which could work for any topology) is to take an previously-calculated list of still-lifes, and post-process it to filter out any undesired topologies. This is exactly what I used in my still-life searches.
Yeah, that's what I was doing. However, I will need to make sure there is a single connected component to avoid getting all these results (filtering 24 bit patterns).

Code: Select all

x = 120, y = 121, rule = B3/S23
8b2o12bo10b2o10b2o13bo3bo7bo3bo12bo3bo19bo$7bo2bo10bobo10bo9bo2bo8b2ob
obobobo5bobobobo3bo6bobobobo2b2o5bo3bo3bobo$8bo2bo9bobo8bo11bo2bo9bobo
bobo2bo4bobobobo2bobo4bo2bobobo3bo4bobobobobo2bo$9b2o11bo9b2o8b2o4b2o
5bo3bobo2bobo5bo2bobobo2bo4bobo2bobobo6bobobobobobo$41bo8bo4b2o2bobo3b
o9bobobobo6bo3bobob2o6bo2bobo2bo$9b4o7b5o7b4o5bo8bo9bo15bo3bo12bo13bob
o$8bo4bo5bo5bo5bo4bo5b2o4b2o58bo$9b4o7b5o5bo2b3o8bo2bo$31b2o11bo2bo$
11b2o9bo11b2o9b2o$11bo2bo6bobo11bo$13b2o6bobo9bo$22bo10b2o7$4bo9bo9bo
9bo8b2o8b2o10bo3b2o10bo3b2o7bo3bo3bo6b2o3bo3bo$3bobo7bobo7bobo7bobo6bo
2bo6bo2bo4b2o2bobobo2bo5b2obobobo2bo5bobobobobobo4bo2bobobobobo$2bo2bo
6bo2bo6bo2bo6bo2bo6bo2bo6bo2bo4bo3bobobo2bo6bobobobo2bo4bo2bobobobobo
4bo2bobobobobo$3b2o8b2o8b2o8b2o8b2o8b2o7bobobo2b2o5bo3bobo2b2o5bobo2bo
bo2bo6b2o2bobo2bo$61b2obobo9b2o2bobo10bo3bobo13bobo$b4o6b4o6b4o6b4o6b
4o6b4o10bo15bo16bo15bo$o4bo4bo4bo4bo4bo4bo4bo4bo4bo4bo4bo$b3obo4bob3o
6b4o6b4o6b4o6b4o$4bo6bo$b2o10b2o8b2o6b2o8b2o8b2o$bo12bo7bo2bo4bo2bo7bo
8bo2bo$3bo8bo10bobo4bobo10bo7b2o$2b2o8b2o10bo6bo10b2o9$5bo9bo9bo9bo9bo
9bo8b2o11b2o8b2o8b2o8b2o9b2o$4bobo7bobo7bobo7bobo7bobo7bobo6bo2bo11bo
9bo9bo9bo10bo$4bo2bo6bo2bo6bo2bo6bo2bo6bo2bo6bo2bo6bo2bo8bo9bo9bo9bo
10bo$5b2o8b2o8b2o8b2o8b2o8b2o8b2o9b2o8b2o8b2o8b2o9b2o2$3b4o6b4o6b4o6b
4o6b4o6b4o6b4o7b4o6b4o6b4o6b4o7b4o$2bo4bo4bo4bo4bo4bo4bo4bo4bo4bo4bo4b
o4bo4bo5bo4bo4bo4bo4bo4bo4bo4bo5bo4bo$3b3obo4bob3o6b4o6b4o6b4o6b4o6b4o
5bo2b3o6b4o6b4o6b4o7b4o$6bo6bo59b2o$3b2o10b2o8b2o8b2o6b2o8b2o8b2o11b2o
8b2o8b2o6b2o9b2o$3bo12bo7bo2bo6bo2bo4bo2bo6bo2bo7bo13bo7bo2bo6bo2bo4bo
2bo7bo2bo$5bo8bo10bobo6bobo6bobo6bobo10bo9bo9bo2bo5bo2bo5bo2bo6bo2bo$
4b2o8b2o10bo8bo8bo8bo10b2o9b2o9b2o7b2o7b2o8b2o11$9b2o10b2o8b2o9b2o9b2o
9b2o7b2o9b2o11b2o9b2o$7bo2bo8bo2bo7bo2bo7bo2bo7bo2bo7bo2bo6bo2bo7bo2bo
7bo2bo7bo2bo$7b2o10b2o10b2o9b2o7bo2bo7bo2bo9b2o9b2o7b2o9b2o$52b2o9b2o$
5b4o8b4o8b4o7b4o29b4o7b4o7b4o7b4o$4bo4bo6bo4bo6bo4bo5bo4bo5b4o7b4o7bo
4bo5bo4bo5bo4bo5bo4bo$5b3o2bo4bo2b3o6bo2b3o7b4o5bo4bo5bo4bo5bo2b3o7b4o
5bo2b3o7b4o$8b2o6b2o10b2o20b4o7b4o7b2o20b2o$5b2o12b2o10b2o7b2o33b2o7b
2o11b2o7b2o$5bo14bo11bo6bo2bo9b2o9b2o11bo6bo2bo11bo6bo2bo$7bo10bo11bo
7bo2bo11bo9bo2bo7bo7bo2bo10bo7bo2bo$6b2o10b2o10b2o7b2o10bo13b2o7b2o7b
2o11b2o7b2o$51b2o13$6b2o12b2o8b2o8b2o9b2o8b2o8bo3bo10b2o3bo$5bo2bo11bo
9bo9bo10bo9bo8bobobobo8bo2bobobo$6bo2bo12bo9bo9bo10bo9bo5bo2bobobo8bo
2bobobo$3b3o4bo10b2o8b2o8b2o9b2o8b2o5bobo2bobob2o6b2o2bobob2o$2bo8bo
48bo9bo3bobobo11bobobo$3bo8bo6b4o6b4o6b4o7b4o5bob3o11bo4bo10bo4bo$4bo
4b3o6bo4bo4bo4bo4bo4bo5bo4bo4bo4bo14b2o14b2o$5bo2bo8bo2b3o6b4o6b4o7b4o
6b3obo$6bo2bo8b2o43bo$7b2o12b2o8b2o8b2o7b2o8b2o$22bo7bo2bo6bo2bo5bo2bo
7bo$20bo9bo2bo5bo2bo5bo2bo10bo$20b2o9b2o7b2o7b2o10b2o8$6bo10bo10bo9b2o
10b2o9b2o8b2o8b2o9b2o$5bobo8bobo8bobo7bo2bo10bo10bo7bo2bo6bo2bo7bo2bo$
4bo2bo7bo2bo7bo2bo7bo2bo8bo10bo10b2o6bo2bo7bo2bo$4bobo8bobo8bobo9b2o9b
2o9b2o18b2o9b2o$5bo10bo10bo41b4o$36b4o7b4o7b4o6bo4bo6b4o7b4o$3b5o6b5o
6b5o5bo4bo5bo4bo5bo4bo6b3o2bo4bo4bo5bo4bo$2bo5bo4bo5bo4bo5bo5b4o7b3o2b
o5b4o10b2o6b4o7b4o$3b4obo4bob4o6b5o20b2o17b2o$7bo6bo23b2o7b2o11b2o7bo
12b2o7b2o$5bo10bo10bo10bo2bo5bo11bo2bo8bo10bo6bo2bo$5b2o8b2o9bobo11b2o
7bo10bo2bo6b2o12bo4b2o$27bo20b2o11b2o20b2o!
It's not a very interesting or well-motivated question, but I still wonder if there are dense solutions that are more random looking than hairpin loops. Like this one:

Code: Select all

x = 109, y = 57, rule = B3/S23
52bo3bo$51bobobobo$48bo2bobobobo2bo$47bobobobobobobobo$44bo2bobobobobo
bobobo2bo$43bobobobobobobobobobobobo$40bo2bobobobobobobobobobobobo2bo$
39bobobobobobobobobobobobobobobobo$36bo2bobobobobobobobobobobobobobobo
bo2bo$35bobobobobobobobobobobobobobobobobobobobo$32bo2bobobobobobobobo
bobobobobobobobobobobobo2bo$31bobobobobobobobobobobobobobobobobobobobo
bobobobo$28bo2bobobobobobobobobobobobobobobobobobobobobobobobo2bo$27bo
bobobobobobobobobobobobobobobobobobobobobobobobobobobo$24bo2bobobobobo
bobobobobobobobobobobobobobobobobobobobobobobo2bo$23bobobobobobobobobo
bobobobobobobobobobobobobobobobobobobobobobobo$20bo2bobobobobobobobobo
bobobobobobobobobobobobobobobobobobobobobobobo2bo$19bobobobobobobobobo
bobobobobobobobobobobobobobobobobobobobobobobobobobobo$16bo2bobobobobo
bobobobobobobobobobobobobobobobobobobobobobobobobobobobobobobo2bo$15bo
bobobobobobobobobobobobobobobobobobobobobobobobobobobobobobobobobobobo
bobobobo$12bo2bobobobobobobobobobobobobobobobobobobobobobobobobobobobo
bobobobobobobobobobobobo2bo$11bobobobobobobobobobobobobobobobobobobobo
bobobobobobobobobobobobobobobobobobobobobobobobo$8bo2bobobobobobobobob
obobobobobobobobobobobobobobobobobobobobobobobobobobobobobobobobobobob
o2bo$7bobobobobobobobobobobobobobobobobobobobobobobobobobobobobobobobo
bobobobobobobobobobobobobobobobo$4bo2bobobobobobobobobobobobobobobobob
obobobobobobobobobobobobobobobobobobobobobobobobobobobobobobobo2bo$3bo
bobobobobobobobobobobobobobobobobobobobobobobobobobobobobobobobobobobo
bobobobobobobobobobobobobobobobo$3bobobobobobobobobobobobobobobobobobo
bobobobobobobobobobobobobobobobobobobobobobobobobobobobobobobobobobo$b
2o3bo3bo3bo3bo3bo3bo3bo3bo3bo3bo3bo3bo3bo3bo3bo3bo3bo3bo3bo3bo3bo3bo3b
o3bo3bo3b2o$o107bo$b2o3bo3bo3bo3bo3bo3bo3bo3bo3bo3bo3bo3bo3bo3bo3bo3bo
3bo3bo3bo3bo3bo3bo3bo3bo3bo3b2o$3bobobobobobobobobobobobobobobobobobob
obobobobobobobobobobobobobobobobobobobobobobobobobobobobobobobobobo$3b
obobobobobobobobobobobobobobobobobobobobobobobobobobobobobobobobobobob
obobobobobobobobobobobobobobobobo$4bo2bobobobobobobobobobobobobobobobo
bobobobobobobobobobobobobobobobobobobobobobobobobobobobobobobobo2bo$7b
obobobobobobobobobobobobobobobobobobobobobobobobobobobobobobobobobobob
obobobobobobobobobobobobo$8bo2bobobobobobobobobobobobobobobobobobobobo
bobobobobobobobobobobobobobobobobobobobobobobobo2bo$11bobobobobobobobo
bobobobobobobobobobobobobobobobobobobobobobobobobobobobobobobobobobobo
bo$12bo2bobobobobobobobobobobobobobobobobobobobobobobobobobobobobobobo
bobobobobobobobobo2bo$15bobobobobobobobobobobobobobobobobobobobobobobo
bobobobobobobobobobobobobobobobobo$16bo2bobobobobobobobobobobobobobobo
bobobobobobobobobobobobobobobobobobobobobo2bo$19bobobobobobobobobobobo
bobobobobobobobobobobobobobobobobobobobobobobobobo$20bo2bobobobobobobo
bobobobobobobobobobobobobobobobobobobobobobobobobo2bo$23bobobobobobobo
bobobobobobobobobobobobobobobobobobobobobobobobobo$24bo2bobobobobobobo
bobobobobobobobobobobobobobobobobobobobobo2bo$27bobobobobobobobobobobo
bobobobobobobobobobobobobobobobobo$28bo2bobobobobobobobobobobobobobobo
bobobobobobobobobo2bo$31bobobobobobobobobobobobobobobobobobobobobobobo
bo$32bo2bobobobobobobobobobobobobobobobobobobobo2bo$35bobobobobobobobo
bobobobobobobobobobobobo$36bo2bobobobobobobobobobobobobobobobo2bo$39bo
bobobobobobobobobobobobobobobo$40bo2bobobobobobobobobobobobo2bo$43bobo
bobobobobobobobobobo$44bo2bobobobobobobobo2bo$47bobobobobobobobo$48bo
2bobobobo2bo$51bobobobo$52bo3bo!

mniemiec
Posts: 1340
Joined: June 1st, 2013, 12:00 am

Re: Thread for basic questions

Post by mniemiec » July 8th, 2021, 9:01 pm

mniemiec wrote:
July 8th, 2021, 2:48 pm
Another way to do all of this (which could work for any topology) is to take an previously-calculated list of still-lifes, and post-process it to filter out any undesired topologies. This is exactly what I used in my still-life searches.
pcallahan wrote:
July 8th, 2021, 3:56 pm
Yeah, that's what I was doing. However, I will need to make sure there is a single connected component to avoid getting all these results (filtering 24 bit patterns). ...
That would be just as easy as filtering out pseudo-still-lifes, but altering the rules so that disjoint islands are never connected under any circumstances.
pcallahan wrote:
July 8th, 2021, 3:56 pm
It's not a very interesting or well-motivated question, but I still wonder if there are dense solutions that are more random looking than hairpin loops. Like this one: ...
I don't think the answer is obvious, but it would be easy to figure out by brute force by just taking the known lists of still-lifes (that exist up to 34 bits now) and apply the filters above. Once you have a sub-list of candidates that meet the restricted criteria, it should be easier to examine them manually to see what kinds of behaviors they exhibit.

MathAndCode
Posts: 4913
Joined: August 31st, 2020, 5:58 pm

Re: Thread for basic questions

Post by MathAndCode » July 8th, 2021, 9:46 pm

Is three the maximum factor by which a pattern's population can increase in one generation, and if so, does it require an infinite pattern?
I have historically worked on conduits, but recently, I've been working on glider syntheses and investigating SnakeLife.

mniemiec
Posts: 1340
Joined: June 1st, 2013, 12:00 am

Re: Thread for basic questions

Post by mniemiec » July 8th, 2021, 10:08 pm

MathAndCode wrote:
July 8th, 2021, 9:46 pm
Is three the maximum factor by which a pattern's population can increase in one generation, and if so, does it require an infinite pattern?
Under Life rules, yes. Any tiling consisting of 3x3 tiles containing 3 live cells in any arrangement will turn into 3x3 tiles containing 9 live cells in all tiles except the ones at the edges. This is the theoretical maximum, and you only achieves exactly 3x increase when so tiling an infinite plane.

User avatar
wwei47
Posts: 1018
Joined: February 18th, 2021, 11:18 am

Re: Thread for basic questions

Post by wwei47 » July 12th, 2021, 10:51 pm

How do I make this conversion?

Code: Select all

x = 68, y = 14, rule = B3/S23
58bo$6bo11b2o26bo10bobo$6bo11bobo25bo11bobo$4b2ob2o11bo2b2o9bo9b2ob2o
11bo2b2o$19b2obob3o8bo23b2obob3o$2bobo3bobo7bo2b2o4bo4b5o5bobo3bobo7bo
2b2o4bo$2bo7bo4b2o2bo4b3o8bo6bo7bo4b2o2bo4b3o$2o9b2obo2b2ob4o10bo5b2o
9b2obo2b2ob4o$2bo7bo4b2o2bo4bo17bo7bo4b2o2bo4bo$2bobo3bobo7bo2b2obo17b
obo3bobo7bo2b2obo$19b2ob2o35b2ob2o$4b2ob2o35b2ob2o$6bo39bo$6bo39bo!
Self-proclaimed synthesis "expert"

User avatar
dvgrn
Moderator
Posts: 8210
Joined: May 17th, 2009, 11:00 pm
Location: Madison, WI
Contact:

Re: Thread for basic questions

Post by dvgrn » July 13th, 2021, 8:29 am

wwei47 wrote:
July 12th, 2021, 10:51 pm
How do I make this conversion?

Code: Select all

x = 68, y = 14, rule = B3/S23
58bo$6bo11b2o26bo10bobo$6bo11bobo25bo11bobo$4b2ob2o11bo2b2o9bo9b2ob2o
11bo2b2o$19b2obob3o8bo23b2obob3o$2bobo3bobo7bo2b2o4bo4b5o5bobo3bobo7bo
2b2o4bo$2bo7bo4b2o2bo4b3o8bo6bo7bo4b2o2bo4b3o$2o9b2obo2b2ob4o10bo5b2o
9b2obo2b2ob4o$2bo7bo4b2o2bo4bo17bo7bo4b2o2bo4bo$2bobo3bobo7bo2b2obo17b
obo3bobo7bo2b2obo$19b2ob2o35b2ob2o$4b2ob2o35b2ob2o$6bo39bo$6bo39bo!
Some not-me person will probably know the answer to this off the top of their head, but in the meantime here's a somewhat related question: do you have Extrementhusiast's components collection?

The relevant part of the components collection,

Code: Select all

x = 90, y = 22, rule = LifeHistory
66.B$65.3B$7.B57.3B$4.A4B10.2C20.BABA9.2C8.6B$4.B2A2B11.C20.B2AB10.C
7.7B15.2B$4.2A3BABA8.C.CB5.AB11.BA3B8.C.CB4.2BA5B13.BA3B$5.2B.B2AB9.C
AD.B2.BA.A9.2B.4B8.CAD7BA5B10.2BABA2B$2C3.5BA11.D4B.B2A5.2C3.3B2AB10.
D6B3A6B8.D2BABA3B$.C3.3B.2B12.3B2A2B7.C3.2B2AB12.15B7.CAD2BA4B$.C.C
18.3B2A2B8.C.C4.BA12.15B6.C.CB.6B$2.CAD17.2B2.BA10.CAD2.B.B13.4B3A8B
5.C4.2B3A$3.D5B4.AB6.2A2B14.D5B4.AB10.4BA9B3.2C5.BA2B$5.4B3.BA.A4.ABA
B17.A3B3.BA.A11.BA9B2A11.A$4.2A4B2.B2A6.BA17.B2A4B.B2A18.3B.2AB$4.B2A
3B2A3B25.ABA3B2A3B23.BA$4.A5BA.A30.3BA.A$6.4BAB33.BAB$7.2B$6.4B$5.3AB
$5.2BA$6.A!
... does not in fact seem to be relevant. The star determinedly gets in the way of all of these methods.

There seems to be plenty of variety in how that conversion can happen, such that spark_search ought to be able to find something that fits, in the unlikely event that something isn't known already.

User avatar
creeperman7002
Posts: 275
Joined: December 4th, 2018, 11:52 pm

Re: Thread for basic questions

Post by creeperman7002 » July 14th, 2021, 12:48 pm

Is b2c/s2c omniperiodic? It might be yes according to my claim, and I even came up with a method to construct period-2n margolus oscillators, but I'm not sure. If that's the case, that not only makes it the omniperiodic rule with the fewest transitions (2), but also solves every even period for any margolus-supporting rule.
B2n3-jn/S1c23-y is an interesting rule. It has a replicator, a fake glider, an OMOS and SMOS, a wide variety of oscillators, and some signals. Also this rule is omniperiodic.
viewtopic.php?f=11&t=4856

User avatar
bubblegum
Posts: 951
Joined: August 25th, 2019, 11:59 pm
Location: click here to do nothing

Re: Thread for basic questions

Post by bubblegum » July 19th, 2021, 3:12 pm

spiceagent11 wrote:
July 19th, 2021, 11:52 am
Are light-speed spaceships/puffers/rakes (or ones faster than c/2) possible? Theoretically an infinitely long orthogonal line would travel at light speed (and also be a replicator), so we could use a line and some other stuff to at least get a faster than _WSS speed ship.
Nope, not a finite one. c/2o is a hard limit in rules without B012.
Each day is a hidden opportunity, a frozen waterfall that's waiting to be realised, and one that I'll probably be ignoring
sonata wrote:
July 2nd, 2020, 8:33 pm
conwaylife signatures are amazing[citation needed]
anything

User avatar
dvgrn
Moderator
Posts: 8210
Joined: May 17th, 2009, 11:00 pm
Location: Madison, WI
Contact:

Re: Thread for basic questions

Post by dvgrn » July 19th, 2021, 3:18 pm

bubblegum wrote:
July 19th, 2021, 3:12 pm
Nope, not a finite one. c/2o is a hard limit in rules without B012.
That is to say, it's a hard limit for spaceships traveling through empty space in non-B012 universes such as Conway's Life.

There are known spaceship-looking things that travel through infinite agars that have some ON cells and some OFF cells, that go faster than c/2.

EDIT: Oops, we've been caught by a copycat spammer -- that was a muzik question from half a decade ago:
muzik wrote:
February 15th, 2016, 4:38 am
Are light-speed spaceships/puffers/rakes (or ones faster than c/2) possible? Theoretically an infinitely long orthogonal line would travel at light speed (and also be a replicator), so we could use a line and some other stuff to at least get a faster than _WSS speed ship.
Drat, bother, and humbug, you evil copycat scammers! The usual ban has been applied. Just noticed that "ban" is the first three letters of "banality of evil".

User avatar
Freywa
Posts: 831
Joined: June 23rd, 2011, 3:20 am
Location: Singapore
Contact:

Re: Thread for basic questions

Post by Freywa » July 24th, 2021, 5:30 pm

reflectors-180-2.lif in jslife (cf. this delaying p4 reflector):

Code: Select all

#CTwo closely-related fast 180-degree reflection reactions,
#Cshown at various periods.
#CNoam Elkies, 4 Oct 07 - 15 Nov 07.
x = 215, y = 135, rule = B3/S23
13bo3bo27bobobo29bobobo33bobobo38bo3bobobo25bobobo3bobobo$$13bo3bo27bo
37bo33bo3bo38bo3bo33bo7bo$$13bobobo27bobobo33bo33bobobo38bo3bobobo25bo
bobo3bobobo$$17bo27bo3bo33bo33bo3bo38bo7bo25bo7bo$$17bo27bobobo33bo33b
obobo38bo3bobobo25bobobo3bobobo5$43boo5boo$43boo5boo$$41b6ob6o$42bobb
ooboobbo$40bo5bobo5bo$40boo11boo$$45b5o$46bobo$46bobo$45bobobo$45bo3bo
$$45bobobo$41boobbooboobboo$40bobbobooboobobbo$40bobobbooboobbobo$39b
oobb3o3b3obboo$39bobbo9bobbo$40boobobo3boboboo$41bobobo3bobobo$40bobbo
7bobbo$41boo9boo$45booboo$41booboboboboboo$39bobb3obbobb3obbo$39boo13b
oo$45bo3bo33boo79bo$44booboboo26boo5b3o76bobo43boo$42boo3bo3boo23bobbo
bbo4bo27booboobo40bo3bo25bo16bo$42boobo3boboo23bobobbob4oboboo22boobb
ooboo39bo3bo24b3o13bobo$41boobbooboobboo21boobb3obo4bobo31bo39bo3bo23b
3obo7boo3boo$41b3obbobobb3o22bobo3bobbobbobo23boo46bo3bo22b3obbo6b4o$
46bobo27bobooboobboboobooboo19boo5boo39bo3bo23b4o6bobb3o$41bobobb3obbo
bo20boboo5boo4bo4bo26boo39bo3bo19boo3boo7bob3o$41bo3bo3bo3bo19bobo3bob
oobb3obob3o20bo48bobo19bobo13b3o$43bo7bo21bobboboobobbobbooboo22booboo
bboo41bo20bo16bo$43bo7bo22boo7boo30bobooboo62boo$$47bo4$41boobboo36boo
bboo26boobboo37boobboo33boobboo$41boobboo36boobboo26boobboo37boobboo
33boobboo$51boo40boo30boo41boo37boo$51bobo39bobo29bobo40bobo36bobo$51b
o41bo31bo42bo38bo$44bo70boo$43bobo26boo7boo28boo4b4o61boo$43boobbobo
21bobboboobobbobb5o21boobboob3o41bo20bo15b3o$41boobbobboo21bobo3boboo
bb3obob3o23bo45b3o19bobo16bo$42bobo27boboobo3boo4bo4bo67booboo19boobbo
bbo6bo4bo$42bob6o24bobooboobb4obooboo66b3ob3o21bo3bo6bo4bo$43bo5bo24bo
bo4boobobobo70b3ob3o21bo4bo6bo3bo$44b3o26boob4obobbobobo70b3ob3o21bo4b
o6bobbobboo$46bo27bobobbob4oboboo69b3ob3o22bo16bobo$74bobbobbo4bo74boo
boo24b3o15bo$75boo5b3o76b3o43boo$81boo79bo10$76boo40boo30boo41boo$76bo
bo39bobo29bobo40bobo$78bo41bo31bo42bo$78boo40boo30boo41boo5$19bo$19b3o
bobboo177bo$22boo3bo177b3o$19boo3b3o181bo$19boboobo182boo$23bo4boo$22b
oo3bobo180bo$18booboo4bo181b3o$17bobobbo3boo15boo163b5o$18bo3bo15boobb
obo163boob3o$22bo14b3obbo166bobbo$22bo10boo5b3o167boo$23bobo6bobboboob
obboo$10boobboo9bo3bobboobobboboobo$10boobboo10b5oboobbobobobbo80bo$
20boo5boo4bobobbobboo81b3obobboo$20bobo7bobboboboo88boo3bo$20bo9bobbob
obo86boo3b3o76boo$35bo3bo84boboobo77bobbo$34boobboo88bo4boo71b3oboo$
11b7o109boo3bobo72b5o$9bob3ob3obo103booboo4bo75b3o$122bobobbo3boo15boo
59bo$8bo3booboo3bo102bo3bo15boobbobo$6boobobbo3bobboboo104bo14b3obbo
63boo$9boobo3boboo107bo10boo5b3o63bo$4bobo3boo5boo3bobo103bobo6bobbob
oobobboo62b3o$4bo3bo11bo3bo90boobboo9bo3bobboobobboboobo48boobboo11bo$
6bo3boo5boo3bo92boobboo10b5oboobbobobobbo48boobboo$3boobobobo7bobobob
oo99boo5boo4bobobbobboo59boo$bobbooboobb3ob3obbooboobbo97bobo7bobbobob
oo63bobo$obboo4boobbobobboo4boobbo96bo9bobbobobo64bo$obbo4bobbo5bobbo
4bobbo86boo23bo3bo$boob6obobobobob6oboo83boo4b4o18boobboo37boo$3bobobb
o3booboo3bobbobo85boobboob3o62bo15b3o$3bo10bo10bo89bo67bobo16bo$4boob
6o3b6oboo159boobbobbo6bo4bo$5b3o5b3o5b3o163bo3bo6bo4bo$bb3o3booboo3boo
boo3b3o160bo4bo6bo3bo$bo3boo3bo3bo3bo3boo3bo159bo4bo6bobbobboo$bb3o3bo
bob5obobo3b3o161bo16bobo$5boobbo9bobboo165b3o15bo$4bobbobobob3obobobo
bbo182boo$4boobbooboobobooboobboo!
But who discovered the much smaller stable catalysts supporting one side of the non-delayed reflection?

Code: Select all

x = 31, y = 25, rule = B3/S23
7b2o4bo$7b2o3bobo$13bo3$2o2b2o2b2o$2o2b2ob2o16bo$9bo15b3o$22bo5bo$22b
6obo$3b2o22bobo$2bo2b2o15b2o2bo2b2o$2bo4b2o13bobo2b2o$2o3bob2o17bobo$b
obo23bo$bob6o$2bo5bo$3b3o$5bo19b2o2b2o$25b2o2b2o3$17bo$16bobo3b2o$17bo
4b2o!
Princess of Science, Parcly Taxel

Code: Select all

x = 31, y = 5, rule = B2-a/S12
3bo23bo$2obo4bo13bo4bob2o$3bo4bo13bo4bo$2bo4bobo11bobo4bo$2bo25bo!

User avatar
bibunsekibun
Posts: 188
Joined: April 17th, 2021, 7:58 pm
Location: TRAPPIST-1e

Re: Thread for basic questions

Post by bibunsekibun » July 25th, 2021, 1:00 am

Is it possible to make an Oscillator of any Period with CC Reflector Loop?
I'm sleepy
I'm not good at English, so please let me know if you have any grammatical mistakes
My Favorite Pattern is 60P312

Citation needed
Posts: 58
Joined: April 1st, 2021, 1:03 am

Re: Thread for basic questions

Post by Citation needed » July 25th, 2021, 2:07 am

ColorfulGabrielsp138 wrote:
July 21st, 2021, 5:46 am
ColorfulGabrielsp138 wrote:
June 27th, 2021, 12:57 am
ColorfulGabrielsp138 wrote:
June 20th, 2021, 3:35 am

EDIT: There's a MWSS from xp0_bokabb
The MWSS was the 23rd most common on Catagolue.
The twin hats was the 48th.
So now it may be the twin hats.
Twin hats: 48th
Snorkel loop: 95th
Now the snorkel loop wins...

EDIT: It's the snorkel loop on block
What is the difference between the snorkel loop and the "snorkel loop on block"?

And why did you post such vague answers to Trump's questions?

User avatar
bubblegum
Posts: 951
Joined: August 25th, 2019, 11:59 pm
Location: click here to do nothing

Re: Thread for basic questions

Post by bubblegum » July 25th, 2021, 2:57 am

Citation needed wrote:
July 25th, 2021, 2:07 am
What is the difference between the snorkel loop and the "snorkel loop on block"?
Well, the snorkel loop on block has a block on the snorkel loop.

More specifically, the snorkel loop on block is one of these three pseudos:

Code: Select all

x = 25, y = 11, rule = B3/S23
21b2o$21b2o2$5b2o6b2o6b2o$4bo2bo4bo2bo4bo2bo$5bobo5bobo5bobo$2obobob2o
2bobob2o2bobob2o$2ob2o6b2o6b2o2$11b2o$11b2o!
bibunsekibun wrote:
July 25th, 2021, 1:00 am
Is it possible to make an Oscillator of any Period with CC Reflector Loop?
No, because for periods like 2, the gliders won't be able to move normally.

Assuming that for sufficiently high periods such that the loop will actually function, sure - two wrongs make a right, at least in binary world. Just put four of them in a loop, with four gliders circling between them.
Each day is a hidden opportunity, a frozen waterfall that's waiting to be realised, and one that I'll probably be ignoring
sonata wrote:
July 2nd, 2020, 8:33 pm
conwaylife signatures are amazing[citation needed]
anything

ColorfulGabrielsp138
Posts: 288
Joined: March 29th, 2021, 5:45 am

Re: Thread for basic questions

Post by ColorfulGabrielsp138 » July 25th, 2021, 5:37 am

bubblegum wrote:
July 25th, 2021, 2:57 am
Citation needed wrote:
July 25th, 2021, 2:07 am
What is the difference between the snorkel loop and the "snorkel loop on block"?
Well, the snorkel loop on block has a block on the snorkel loop.

More specifically, the snorkel loop on block is one of these three pseudos:

Code: Select all

x = 25, y = 11, rule = B3/S23
21b2o$21b2o2$5b2o6b2o6b2o$4bo2bo4bo2bo4bo2bo$5bobo5bobo5bobo$2obobob2o
2bobob2o2bobob2o$2ob2o6b2o6b2o2$11b2o$11b2o!
And even more specifically, I'm referring to the one on the left, that is, the one that appeared in my username Braille soup:

Code: Select all

x = 156, y = 8, rule = B3/S23
4b2ob2o2b2o5b2o5b2o5b2o5b2ob2o2b2o5b2o12b2ob2o2b2o5b2o5b2o8b2o2b2o5b2o
8b2o2b2ob2o5b2o2b2o5b2ob2o2b2o$4b2ob2o2b2o5b2o5b2o5b2o5b2ob2o2b2o5b2o
12b2ob2o2b2o5b2o5b2o8b2o2b2o5b2o8b2o2b2ob2o5b2o2b2o5b2ob2o2b2o2$14b2o
2b2o8b2o2b2ob2o2b2o12b2o12b2ob2o9b2o5b2ob2o2b2o8b2o2b2o5b2o5b2o8b2o16b
2ob2o$14b2o2b2o8b2o2b2ob2o2b2o12b2o12b2ob2o9b2o5b2ob2o2b2o8b2o2b2o5b2o
5b2o8b2o16b2ob2o2$2o9b2o5b2o5b2o5b2o12b2ob2o2b2o8b2o23b2o19b2o5b2o5b2o
5b2ob2o$2o9b2o5b2o5b2o5b2o12b2ob2o2b2o8b2o23b2o19b2o5b2o5b2o5b2ob2o!
[[ Z 4 ]]
How common is it? How common are the other two?

"Citation needed" may continue to ask what a "pseudo" is.

Code: Select all

x = 21, y = 21, rule = LifeColorful
11.E$10.3E$10.E.2E$13.E4$2.2B$.2B$2B$.2B15.2D$19.2D$18.2D$17.2D4$7.C$
7.2C.C$8.3C$9.C!
I have reduced the glider cost of quadratic growth to eight and probably to seven. Looking for conduits...

Sokwe
Moderator
Posts: 2011
Joined: July 9th, 2009, 2:44 pm

Re: Thread for basic questions

Post by Sokwe » July 25th, 2021, 8:48 am

Freywa wrote:
July 24th, 2021, 5:30 pm
who discovered the much smaller stable catalysts supporting one side of the non-delayed reflection?
Michael Simkin found the catalysis on May 24, 2015. Later that same day I pointed out that it worked with Noam Elkies' 180-degree reflectors.
-Matthias Merzenich

User avatar
yujh
Posts: 2433
Joined: February 27th, 2020, 11:23 pm
Location: Toronto, On, Canada (加拿大,安大略省,多伦多)
Contact:

Re: Thread for basic questions

Post by yujh » July 27th, 2021, 12:40 pm

AAFE63AD-0A83-402C-98BC-F8A134967BB0.jpeg
AAFE63AD-0A83-402C-98BC-F8A134967BB0.jpeg (628.47 KiB) Viewed 586 times
What is this? I was sending a pm to Yoel on they’ll post(because it is already posted and the I got a notification on another pm but when I clicked it I saw this:
Last edited by yujh on August 1st, 2021, 12:23 pm, edited 1 time in total.
Nothing to apgsearch? Try b38s23/C1!

B34kz5e7c8/S23-a4ityz5k!!!

b2n3-q5y6cn7s23-k4c8

B3-kq6cn8/S2-i3-a4ciyz8

B3-kq4z5e7c8/S2-ci3-a4ciq5ek6eik7

wiki

Rule modifier

Bored of Conway's Game of Life? Try Pedestrian Life -- not pedestrian at all!

Citation needed
Posts: 58
Joined: April 1st, 2021, 1:03 am

Re: Thread for basic questions

Post by Citation needed » July 28th, 2021, 2:37 am

What is the apgcode of the U-turner methuselah?
Shouldn't it be xp0_35ee?
Why did they say "xp0_211u" on LifeWiki, which refers to a completely different pattern?

User avatar
bubblegum
Posts: 951
Joined: August 25th, 2019, 11:59 pm
Location: click here to do nothing

Re: Thread for basic questions

Post by bubblegum » July 28th, 2021, 3:04 am

Citation needed wrote:
July 28th, 2021, 2:37 am
What is the apgcode of the U-turner methuselah?
Shouldn't it be xp0_35ee?
Why did they say "xp0_211u" on LifeWiki, which refers to a completely different pattern?
What are you talking about?
Each day is a hidden opportunity, a frozen waterfall that's waiting to be realised, and one that I'll probably be ignoring
sonata wrote:
July 2nd, 2020, 8:33 pm
conwaylife signatures are amazing[citation needed]
anything

hotdogPi
Posts: 458
Joined: August 12th, 2020, 8:22 pm

Re: Thread for basic questions

Post by hotdogPi » July 28th, 2021, 6:30 am

Citation needed wrote:
July 28th, 2021, 2:37 am
What is the apgcode of the U-turner methuselah?
Shouldn't it be xp0_35ee?
Why did they say "xp0_211u" on LifeWiki, which refers to a completely different pattern?
The 10-cell form was chosen partly because that's what C28 asked about and partly because most U-turners go through that phase (or that phase plus a dying banana spark). xp0_211u is a 1-tick predecessor. I don't have that strong of an opinion of which form should be the canonical form; the R-pentomino and pi-heptomino are both in forms that don't always occur in the evolutionary sequence.
User:HotdogPi/My discoveries

Periods discovered: 6,8,10-16,18,20,21G,22,24,25,27-31,32SG,35,36,40,42,45,48,50,54G,55G,57G,60,63-66,70,74S,75,76S,84,96S,100,117G,120,126,128S,138,147,156,196S,217,486,576

S: SKOP
G: gun

User avatar
C28
Posts: 197
Joined: December 8th, 2020, 12:23 pm
Location: minus world

Re: Thread for basic questions

Post by C28 » July 28th, 2021, 5:40 pm

would this be classified as a hassler?

Code: Select all

x = 13, y = 16, rule = B3/S23
10b2o$10bobo$7b2obobo$7bobobo$9bo$7bo2bo$10bo$6bo3bo$2bobobo3bo$bobo6b
o$bo5bo2bo$2o7bo$7bobobo$7b2obobo$10bobo$10b2o!

Code: Select all

x = 11, y = 15, rule = B3/S23
9bo$8bobo$8bobo$9bo8$b3o$b3o$obo$2o!
can we make a (13,4)c/41 spaceship?

Post Reply