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dvgrn wrote: March 31st, 2020, 10:38 am

HartmutHolzwart wrote: March 31st, 2020, 1:39 am Matthias Merzenich maintains jslife-moving-master as an update to jslife. There is a c5d folder there! Check out on Github, newest version from Jan, 22nd., 2020.

I did mention the jslife-moving collection, but should have added an actual link to the relevant folder. I was looking at an out-of-date local copy; an old p1585 rake was added since I downloaded it, but not surprisingly it's not anything you could call "small" either.

Naszvadi wrote: March 27th, 2020, 5:53 am AFAIK there'd been constructed several c/5d puffers already, but here is a compact one from scratch using only 3 ships and a glider:

Code: Select all

x = 63, y = 63, rule = B3/S23
55bo5bo$54bo7bo$57b4obo$53bo2bo3b2o$53bo2bo2b3o$53bo4bo$54bob3o$54b2ob
2o$50b3o4b2o$50b3o$48b2o$48b2o$48b2o$43b3o$41bo4b2o$40bo6bo$43b2obo$
42bo3b3o$42bo2b4o$42bobo$42b3o$40bo2b2o$41b2o12$49bo5bo$48bo7bo$51b4ob
o$47bo2bo3b2o$47bo2bo2b3o$47bo4bo$15bo5bo26bob3o$14bo7bo25b2ob2o$17b4o
bo21b3o4b2o$13bo2bo3b2o9bo12b3o$13bo2bo2b3o7bobo10b2o$13bo4bo11b2o10b
2o$14bob3o23b2o$14b2ob2o18b3o$10b3o4b2o16bo4b2o$10b3o21bo6bo$8b2o27b2o
bo$8b2o26bo3b3o$8b2o26bo2b4o$3b3o30bobo$bo4b2o28b3o$o6bo26bo2b2o$3b2ob
o28b2o$2bo3b3o$2bo2b4o$2bobo$2b3o$o2b2o$b2o!

Hunting wrote: March 31st, 2020, 10:45 am Then say congratulations to Naszvadi, he discovered the smallest c/5d puffer:

Naszvadi wrote: March 27th, 2020, 5:53 am AFAIK there'd been constructed several c/5d puffers already, but here is a compact one from scratch using only 3 ships and a glider:

Code: Select all

x = 63, y = 63, rule = B3/S23
55bo5bo$54bo7bo$57b4obo$53bo2bo3b2o$53bo2bo2b3o$53bo4bo$54bob3o$54b2ob
2o$50b3o4b2o$50b3o$48b2o$48b2o$48b2o$43b3o$41bo4b2o$40bo6bo$43b2obo$
42bo3b3o$42bo2b4o$42bobo$42b3o$40bo2b2o$41b2o12$49bo5bo$48bo7bo$51b4ob
o$47bo2bo3b2o$47bo2bo2b3o$47bo4bo$15bo5bo26bob3o$14bo7bo25b2ob2o$17b4o
bo21b3o4b2o$13bo2bo3b2o9bo12b3o$13bo2bo2b3o7bobo10b2o$13bo4bo11b2o10b
2o$14bob3o23b2o$14b2ob2o18b3o$10b3o4b2o16bo4b2o$10b3o21bo6bo$8b2o27b2o
bo$8b2o26bo3b3o$8b2o26bo2b4o$3b3o30bobo$bo4b2o28b3o$o6bo26bo2b2o$3b2ob
o28b2o$2bo3b3o$2bo2b4o$2bobo$2b3o$o2b2o$b2o!

gameoflifemaniac wrote: April 6th, 2020, 1:27 pm How to find the number of different 3-glider collisions?

x = 86, y = 105, rule = B3/S23
bo$2bo$3o91$84bo$83bo$83b3o7$81bo$80b2o$80bobo!

dvgrn wrote: April 6th, 2020, 4:19 pm

gameoflifemaniac wrote: April 6th, 2020, 1:27 pm How to find the number of different 3-glider collisions?

Rough answer: count the number of lines of data in rles.txt or colseqs.txt. Answer: 464,745.

Not-so-rough answer: go through those collisions and remove any duplicates you find (there do seem to be a few) and maybe find any that are missing. That 464,745 number has definitely not been verified, and if other people tried to independently repeat 2718281828's work, they would no doubt come up with slightly different total numbers.

To get a precise answer, first you'll have to define exactly what a "three-glider collision" means. There are a very large number of cases where, e.g., a glider gets kicked back into a long-running 2G reaction like two-glider mess, or a glider from the two-glider mess collides with another glider to make another two-glider mess that interacts with the first two-glider mess.

For example, keep moving the northernmost glider in the pattern below northwards in steps of two, and decide exactly when the resulting three-glider collision stops counting as a new three-glider collision, and starts being just "more of the same". Unless you decide that, there isn't really a well-defined answer to the question, because we can trivially get an unbounded number of distinct big messy boring constellations just by moving that one glider farther north:

Code: Select all

x = 86, y = 105, rule = B3/S23
bo$2bo$3o91$84bo$83bo$83b3o7$81bo$80b2o$80bobo!

It seems to be that this reaction at least should really count as a unique collision (just not a particularly interesting one). But I don't think it's included in 2718281828's lists, because it can't be found using the synthesise-patt script. So probably hundreds of thousands of other useless huge messy constellations are also excluded from the 464,745 number.

bubblegum wrote: April 24th, 2020, 11:34 pm how do i use python with golly? i think i'm doing something right because it's crashing, not throwing up an error message when i put in the path to the file (python27.dll in the python section of the scripts folder)

yujh wrote: April 26th, 2020, 8:27 amAny search program for sparklers or grey ships?

dvgrn wrote: April 26th, 2020, 8:42 am

yujh wrote: April 26th, 2020, 8:27 amAny search program for sparklers or grey ships?

Sparkers -- start with JLS, it's fairly easy to get it set up, though it takes some practice to understand how to set up a search.

Grayships are more of an art than a science; I think people use JLS/WLS/lifesrch also to find the various pieces of grayships and put them together, but there's no simple walkthrough to explain how that's done.

yujh wrote: April 26th, 2020, 8:50 am
Oh no is this Java?
I know nothing about it and where can I download it?

yujh wrote: April 26th, 2020, 11:26 pm How can I run it?(I use windows)
I don’t know how to use java.
[ymydzh]
Meanwhile, is there other python based things?

gameoflifemaniac wrote: April 27th, 2020, 10:41 am Are there any aperiodic spaceships in Life?

wildmyron wrote: April 27th, 2020, 1:02 pm

gameoflifemaniac wrote: April 27th, 2020, 10:41 am Are there any aperiodic spaceships in Life?

Can you give a definition of "aperiodic spaceships"? I can imagine a few theoretical constructs that merit that description, but no idea if they qualify.

yujh wrote: April 26th, 2020, 11:26 pm Meanwhile, are there other python-based scripts?

Hunting wrote: April 27th, 2020, 11:36 pm

yujh wrote: April 26th, 2020, 11:26 pm Meanwhile, are there other python-based scripts?

Make one yourself!