ConwayLife.com

Another piece of technology that might come in handy is the stable Universal Register Machine that Paul Chapman built back in 2005 , based on a periodic MRM from 2002 . The pattern file still has a few misplaced (overlapping) pieces in it, though, if I remember right, so some redesign work would ha...

EDIT: magma says: a very cheap option would be to just use a caber tosser as a timer would make the entire machine exponentially slower though This caber tosser can replace the p(2^24) guns in the GPC from the 'smaller pi calculator challenge' thread: https://conwaylife.com/forums/viewtopic.php?f=2...

Growing knightship: x = 102, y = 218, rule = B3678/S34678 4b3o$2b3ob3o$b4o2b2o$3o3b2obo$2o2b2ob2o$o2bo3b2o$7b2o2bo$2o5bo2b2o$4b 4ob2o$b2ob7o$b2ob2o2b3o$2b2o2bo3b2o$2b2o2bob2o$3b2o3bob4o$3bo2b2o4b2ob o$6b3obo3bo$5b4obo$7b9obo$7bob2ob4obo$8bo2bo3bob2o$8b3ob7o$8b2o4bo2b2o $9bo5b3o$10b5ob2o$11b2obo$11bo...

Hunting wrote: ↑

October 26th, 2020, 9:20 am

Trump {Bot} wrote: ↑

October 25th, 2020, 9:38 pm

Are there any useful discoveries made by Chinese users?
I'm really Nervous...

Yes, there are several. Many synthesises were found by GUYTU6J, many billard tables were found by Bullet51.

and rlifesrc was created by AlephAlpha.

Unfortunately, for me this is sometimes annoying because I can't find the original hauls in which these objects occurred. For example a few days ago I was looking at the b3s23/ikpx2_stdin census and found yl8_1_3_1463956f33241332e72e4a2c9f4ecc61 , which has over 300 occurrences but no sample soups....

wwei23 wrote: ↑

October 20th, 2020, 8:40 am

Jormungant wrote: ↑

October 20th, 2020, 7:05 am

p41 wick stabilization

At long last? It's been stabilized?

My guess is that it's pseudo-period, because p41 is faster than the recovery time of these Herschel conduits.

Yes! This is one of the ideas behind fault-tolerant quantum computing: if you have a logic gate that makes mistakes with a certain (sufficiently low) probability, you can reduce the error rate by using an error-correcting code (the 'repetition code' you mention being a very simple error-correcting ...

The 'torsion-free' case where gcd(a, b, p) = 1 is conceptually much simpler, because it means that the patterns just live on an ordinary grid isomorphic to Z^2; ikpx2 was written using this assumption for the sake of simplicity, and as such can't find oscillators. So then shouldn't that prevent it ...

I'm not exactly sure what CA-related politics is Running a cellular automaton on a graph where: The vertices of the graph are electoral constituencies; The edges between vertices represent contiguity; The states of the cellular automaton are the different political parties; The initial state of eac...

Is there by any chance a way to save completed ships or pause when a ship is completed? I am running a long search and it would be a shame to just lose a result due being unable to find it. ./ikpx2 [OPTIONS] | tee -i progress.txt will make a persistent copy of the terminal output that you can later...

Simplest example but a beat cheating - take a rule where some states are deterministic and some probabilistic. Say you have probabilistic signal that can die out with small probability but a deterministic logical operations on that signal. Now you want to create an output of A and B in form of A&B....

Aw yeah! I can't complete that since I'm on my phone right now, but someone, quick! Bounce those gliders into that leftover junk with some Snarks! Edit: How did you even find that? Boojums suffice. Here's a demonstration that it's possible to get an H into that location: x = 129, y = 110, rule = Li...

Maybe clone the repository again? It looks like your submodules are somehow confused.

(Adding symmetry to odd-period diagonal searches would be extremely difficult.) Out of curiosity, why so? Also, could ikpx2 be adapted to oscillator searches as a "0c spaceship"? I'll answer these questions in the reverse order. Let's start by considering how to represent the problem of 'a pattern ...

LaundryPizza03 wrote: ↑

October 16th, 2020, 4:54 pm

Would it be possible to apply symmetry to diagonal ships as well? It would speed up diagonal searches like this one.

Good idea. I've added symmetric and glide-reflective searching for even-period diagonal searches. (Adding symmetry to odd-period diagonal searches would be extremely difficult.)

It works like a charm, but: From my own runs of ikpx2, doesn't it print far less than 10000 partials in a reasonable amount of time? How would we reach 10000 partials to upload an ikpx2_stdin haul? EDIT: I'm just going to try it and hope for the best. Only a small subset of the partials are printed...

Since there hasn't been an official announcement, I thought I'd mention that ikpx 2.2 is available here: https://gitlab.com/apgoucher/ikpx2 It's a considerable improvement over the original ikpx in a number of ways: Supports arbitrary isotropic 2-state Moore-neighbourhood cellular automata (not just...

Here are a bunch of things that have emerged within several minutes of running: ./ikpx2 -v c/2 -n 10000 after compiling ikpx2.2 to target MirrorTLife. Period-10 c/2 ship: x = 17, y = 8, rule = B3-kq4j/S2-i34q 3bo3b3o3bo$b2ob2ob3ob2ob2o$b2ob4ob4ob2o$bo2bo7bo2bo$2o4b2ob2o4b2o$6bo 3bo$5bo5bo$6bo3bo! Pe...

Here's a backshooting Corderpuffer which takes 896381 generations to tunnel through the ash: x = 16, y = 16, rule = B3/S23 b4ob4o2bobo$2b2o4b3obo2bo$b2o2bobo2bo3b2o$b2o3b6o2b2o$o2bo3bo2b2o2b2o$ 4b4o2bo2b2o$bob2o3b2obo2b2o$b2ob2ob2o2b5o$4bo2bobo2bo2bo$b4ob4ob2ob2o$ b2o2bobobob4o$2o2bo2b2ob4o$o2bobo2b...

Then why does Sir Robin appear to have scoliosis? That's a feature, not a bug. 'Floating rows' were supported in Eugene Langvagen's search program that found the almost knightship, as well as in every version of ikpx and in Andrew Wade's LSSS program. Effectively, it means that we take advantage of...

Something else that I don't get is using orthogonal bounding boxes for non-orthogonal spaceships. Yes, I totally agree with you! That's why ikpx2 uses a coordinate system where: the 'vertical' basis vector is chosen to be exactly in the direction of travel; the 'horizontal' basis vector is reduced ...

Yes, eight hours after feeding Tom Rokicki's partial as input to the original ikpx. Did you try the "almost knightship" from 2004 or so too? I did, yes, but it didn't find anything despite many days of searching. I guess I could try some fresh (2,1)c/6 searches now with ikpx2, but I'm more interest...

wwei23 wrote: ↑

October 7th, 2020, 3:55 pm

calcyman wrote: ↑

October 7th, 2020, 3:50 pm

this would have taken much longer than eight hours.

Wait, you found Sir Robin in only eight hours?

Yes, eight hours after feeding Tom Rokicki's partial as input to the original ikpx.

In its smallest phase, Sir Robin consists of 282 cells in a 31-by-79 box. Suffice it to say, my search program didn't trawl through all (2449 choose 282) = 181654257989156131629560342493802927480209535413052546975839416334355022814198877749155652714875723281536584143981407552460938044814334983536608...

I'm not sure exactly which day it was published, but it was this month:

http://www.ibiblio.org/lifepatterns/october1970.html

Do you think we should keep an archived copy on the LifeWiki, as has been done for LifeLine?