Thread for basic questions

For general discussion about Conway's Game of Life.
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Gustone
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Re: Thread for basic questions

Post by Gustone » October 14th, 2019, 12:37 pm

Is there a spaceship that can support this tagalong

Code: Select all

x = 4, y = 5, rule = B3/S23
2b2o2$2o$2bo$2o!
eurasia

Code: Select all

x = 19, y = 2, rule = B3/S23
13o$12b7o!

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Hdjensofjfnen
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Re: Thread for basic questions

Post by Hdjensofjfnen » October 21st, 2019, 8:23 pm

All the buzz has been about colliding gliders to cleanly make a Sir Robin. But is it possible for a finite amount of Sir Robins to cleanly make a single glider? After all, the knightship's so big it's hard to clean any reaction up.
"A man said to the universe:
'Sir, I exist!'
'However,' replied the universe,
'The fact has not created in me
A sense of obligation.'" -Stephen Crane

Code: Select all

x = 7, y = 5, rule = B3/S2-i3-y4i
4b3o$6bo$o3b3o$2o$bo!

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toroidalet
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Re: Thread for basic questions

Post by toroidalet » October 21st, 2019, 8:32 pm

Hdjensofjfnen wrote:
October 21st, 2019, 8:23 pm
All the buzz has been about colliding gliders to cleanly make a Sir Robin. But is it possible for a finite amount of Sir Robins to cleanly make a single glider? After all, the knightship's so big it's hard to clean any reaction up.
Colliding 35 pairs of Sir Robins like this can create any 35-glider synthesis, and one of these syntheses sends salvos of gliders in just the right way to destroy all the ash and release an extra glider:

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x = 89, y = 81, rule = B3/S23
62b2o$62bo2bo$25b2o35bo3bo$23bo2bo37b3o$22bo3bo33b2o6b4o$22b3o35bob2o
4b4o$17b4o6b2o30bo4bo6b3o$17b4o4b2obo31b4o4b2o3bo$15b3o6bo4bo28bo9b2o$
15bo3b2o4b4o30bo3bo$19b2o9bo33b3o2b2o2bo$25bo3bo30b2o7bo4bo$15bo2b2o2b
3o46bob2o$14bo4bo7b2o39b2o6bo$14b2obo51b2ob3obo$12bo6b2o47b2o3bo2bo$
12bob3ob2o48bobo2b2o$12bo2bo3b2o47bo2bobobo$14b2o2bobo47b3o6bo$13bobob
o2bo48bobobo3bo$11bo6b3o51b2obobo$11bo3bobobo49bo6b3o$11bobob2o$10b3o
6bo49bo9bo$69bo3bo6bo$9bo9bo50bo5b5o$8bo6bo3bo50b3o$8b5o5bo55b2o$16b3o
52b3o2bo$13b2o54bob3obo$12bo2b3o50bo3bo2bo$13bob3obo49bo4b2ob3o$13bo2b
o3bo50b4obo4b2o$9b3ob2o4bo51bob4o4b2o$6b2o4bob4o59bo$6b2o4b4obo60bo2b
2o$11bo66b2o$6b2o2bo68b5o$9b2o72b2o$5b5o67b3o6bo$4b2o72bobo3bobo$2bo6b
3o65bo3bo3bo$2bobo3bobo66bo3b2o$3bo3bo3bo64bo6bob3o$6b2o3bo65b2o3bo3b
2o$b3obo6bo65b4o2bo2bo$b2o3bo3b2o68b2o3bo$bo2bo2b4o68bo$3bo3b2o70b2obo
$9bo68bo$6bob2o67b5o$10bo66bo4bo$7b5o64b3ob3o$6bo4bo64bob5o$6b3ob3o63b
o$6b5obo65bo$12bo61bo4b4o$10bo67b4ob2o$6b4o4bo60b3o4bo$4b2ob4o71bobo$
6bo4b3o72bo$4bobo75bo2b2o$2bo80b3o$2b2o2bo73b2o$3b3o73b3o5bo$7b2o73b2o
2bobo$bo5b3o69bo2b3obobo$obo2b2o73b2obo2bo$obob3o2bo72bobo2b2o$2bo2bob
2o75b2o$2o2bobo73b3o4bo$3b2o75b3o4bo$bo4b3o72b2o3b3o$bo4b3o73b2ob2o$3o
3b2o75b2o$2b2ob2o76bo$4b2o$5bo76b2o$84bo$5b2o$4bo!
There's also one that systematically searches through 35-glider collisions until it finds one that cleans up all the ash and releases 1 glider, then creates that one, which is slightly more constructive.

EDIT: It would take a little more, since reflection reactions would be needed to get some of the closer gliders.
"Build a man a fire and he'll be warm for a day. Set a man on fire and he'll be warm for the rest of his life."

-Terry Pratchett

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Hdjensofjfnen
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Re: Thread for basic questions

Post by Hdjensofjfnen » November 5th, 2019, 3:13 am

Would this be known as a component, because it adds a 13-cell induction coil onto a block? (Known, by the way.)

Code: Select all

x = 17, y = 13, rule = B3/S23
10bo$8b2o$bo7b2o$2bo$3o2$7b2o$7b2o6bo$14b2o$14bobo$7b2o$6b2o$8bo!
"A man said to the universe:
'Sir, I exist!'
'However,' replied the universe,
'The fact has not created in me
A sense of obligation.'" -Stephen Crane

Code: Select all

x = 7, y = 5, rule = B3/S2-i3-y4i
4b3o$6bo$o3b3o$2o$bo!

Ian07
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Re: Thread for basic questions

Post by Ian07 » November 5th, 2019, 12:01 pm

Hdjensofjfnen wrote:
November 5th, 2019, 3:13 am
Would this be known as a component, because it adds a 13-cell induction coil onto a block? (Known, by the way.)

Code: Select all

x = 17, y = 13, rule = B3/S23
10bo$8b2o$bo7b2o$2bo$3o2$7b2o$7b2o6bo$14b2o$14bobo$7b2o$6b2o$8bo!
I don't think so; since every cell in the block dies at some point in the reaction it can't really be used in any other situation.

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Gustone
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Re: Thread for basic questions

Post by Gustone » November 9th, 2019, 11:20 am

How are mirage flying wing and chehire cat notable
eurasia

Code: Select all

x = 19, y = 2, rule = B3/S23
13o$12b7o!

Ian07
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Re: Thread for basic questions

Post by Ian07 » November 9th, 2019, 11:58 am

Gustone wrote:
November 9th, 2019, 11:20 am
How are mirage flying wing and chehire cat notable
Mirage and Flying wing were both tagged for unclear notability at one point, but the tags were later removed because it had been judged that the consensus was to keep them. As for cheshire cat, it seems to be one of the many patterns and general terms taken from the Life Lexicon. In fact, it appears that every term in the Lexicon (even the most obscure ones like LWTDS) has been added to LifeWiki. I'm not sure I personally agree with these decisions, but that's what been decided.

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dvgrn
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Re: Thread for basic questions

Post by dvgrn » November 9th, 2019, 1:53 pm

Ian07 wrote:
November 9th, 2019, 11:58 am
In fact, it appears that every term in the Lexicon (even the most obscure ones like LWTDS) has been added to LifeWiki. I'm not sure I personally agree with these decisions, but that's what been decided.
The LWTDS entry is a fairly unusual case -- deleted at one point because it's a term that no longer gets much use (if it ever did), but then brought back on general principles because it was in the Life Lexicon.

Most of the strange old irrelevant-looking stuff like Cheshire cat is in the Life Lexicon because it was in LIFELINE. And it's in the LifeWiki because Nathaniel basically started the LifeWiki by importing the 2006 version of the Life Lexicon.

It seems reasonable to leave these scattered "historical interest only" terms in place, since they do get mentioned in old articles and books about Conway's Life. But maybe it would make sense to add some kind of "This term is no longer in common use" template at the top of those articles, to help explain why it's there.

If I remember right, "flying wing" sneaked in to the LifeWiki because it got nominated for a Pattern of the Year competition, and got a few votes. So it became a case where people might stumble over the name and want to look up what it is, even if it's not a particularly notable advance in spaceship technology.

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calcyman
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Re: Thread for basic questions

Post by calcyman » November 30th, 2019, 8:20 am

Is there a universal 2-lane monophase slow-salvo toolkit?
What do you do with ill crystallographers? Take them to the mono-clinic!

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Scorbie
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Re: Thread for basic questions

Post by Scorbie » December 5th, 2019, 11:15 pm

calcyman wrote:
November 30th, 2019, 8:20 am
Is there a universal 2-lane monophase slow-salvo toolkit?
I guess the question is "basic" as in "basic research"? : )
Best wishes to you, Scorbie

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GUYTU6J
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Re: Thread for basic questions

Post by GUYTU6J » December 11th, 2019, 3:34 am

How about a new database that storages the way B-heptomino displace in some Life-like isotropic non-totalistic cellular automata? This can provide insights into the behaviours of INT rules.
In my imagination the information is stored in this format:

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gen,dx,dy,orient,isorulemin,isorulemax
where gen=generations for B to reappear, dx and dy=offsets in two directions, orient=new orientation of B, isorulemin and isorulemax=range of rules for the sequence. Orientations follow the conventions for Herschel conduits:

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x = 73, y = 37, rule = LifeHistory
4D36.3D$D24.D14.D2.D21.D$D14.2A9.D2.2A9.D2.D11.2A9.D2.2A.A$4D12.CA.7D
.D2.CA8.3D13.CA.7D.D2.ACA$D14.2A9.D2.2A9.2D13.2A9.D4.A$D14.A9.D3.A10.
D.D12.A9.D$D39.D2.D4$4D36.3D$D24.D14.D2.D21.D$D4.D3.D5.2A9.D2.A10.D2.
D.D3.D5.2A9.D2.A.2A$4D2.D.D7.CA.7D.D.2A9.3D3.D.D7.CA.7D.D.ACA$D6.D7.
2A9.D3.CA8.2D5.D7.2A9.D3.A$D5.D.D6.A9.D3.2A9.D.D3.D.D6.A9.D$D4.D3.D
30.D2.D.D3.D4$3D37.D$D2.D21.D14.D24.D$D2.D11.2A9.D4.A8.D14.2A9.D3.A$
3D13.CA.7D.D2.2A8.D15.CA.7D.D.ACA$D2.D11.2A9.D2.AC9.D14.2A9.D2.A.2A$D
2.D11.A9.D4.2A8.D14.A9.D$3D37.4D4$3D37.D$D2.D21.D14.D24.D$D2.D.D3.D5.
2A9.D3.2A8.D4.D3.D5.2A9.D4.A$3D3.D.D7.CA.7D.D.AC9.D5.D.D7.CA.7D.D2.AC
A$D2.D3.D7.2A9.D3.2A8.D6.D7.2A9.D2.2A.A$D2.D2.D.D6.A9.D5.A8.D5.D.D6.A
9.D$3D2.D3.D30.4D.D3.D!
#C [[ THUMBNAIL THUMBSIZE 3 ]]
For example, B in Conway's Life evolves into some junk and a new B at gen=64:

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x = 28, y = 15, rule = LifeHistory
14.4B$13.2A5B3.3A$13.2A3BA3B.A2BA$14.3BABA3BA3BA$13.4BABA7BA$11.13BA
3B$4.2B2.16BAB2A$3.24B$.2B2D13B.7B$2A2B2D12B2.B2ABAB$2AB2D13B4.3A$.2B
D13B6.A$2.3B.BA2B$5.2A2B$6.2A!
Then it is encoded as

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64,19,1,R,B3/S23-c,B34ce8/S234c5e8
Some issues I think of:
  • The database includes no information about what actually the B is. Whether B is a oscillator, a spaceship, a replicator or merely a methuselah is not relevant to the offset. (But the new orientation does suggest behaviours.)
  • Why B-heptominos? For me, it seems more likely to be observed in soups for INT rules than R-pentominos, Herschels, buns or block&gliders. But this statement may be biased and I can't decide on other small methuselahs like bookends, pre-loaves and Pi's. There's even the isomeric B-heptaplet. Moreover, unnamed methuselahs in other rules exist. (A survey on the most common small methuselah across INT rules?)
  • The junks around the new B may interact with B so quickly that the characteristics of B is interrupted.
  • Multiple B's can occur simultaneously.
  • The B-heptomino may never appear again in the evolutionary sequence, but one of its descendants reappears and shows its features.
  • The database can be exhaustive, but it may turn out to be randomly collecting stuffs like the 5S database.
I admit that I haven't gone through the general considerations, but the crude idea is potentially powerful.
Removed for swansong, Moosit
I indeed suffer from Life Worker Time Deficiency Syndrome (LWTDS)

Ian07
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Re: Thread for basic questions

Post by Ian07 » December 11th, 2019, 5:00 pm

Does anyone have a comprehensive list of all two-spaceship collisions involving gliders, LWSSes, MWSSes, and/or HWSSes? e.g.

Code: Select all

x = 10, y = 7, rule = B3/S23
7bobo$6bo$6bo$6bo2bo$bo4b3o$2bo$3o!

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