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I have confirmed using Nicolay Beluchenko's version of WLS (WLS 6.3) that 67P5H1V1 is the only p5 c/5 diagonal spaceships of diagonal width 15. The next thinnest known p5 c/5 diagonal spaceship appears to be this width-19 ship found by Adam P. Goucher: x = 65, y = 58, rule = B3/S23 5b3o$4bo3b2o$3b2o...

Could this method be used to find the smallest completion to a partial result, or is it fundamentally limited to searching the whole space? Theoretically maybe, practically probably not. Maybe for very small completions and/or for very friendly geometries (like c/2 or c/3). It would primarily be us...

I have confirmed using Nicolay Beluchenko's version of WLS (WLS 6.3) that the following are the only two symmetric p5 c/5 diagonal spaceships of diagonal width 27: x = 78, y = 38, rule = B3/S23 9b3o38b3o$8bo40bo$7bo40bo$11b2o39b2o$8b2obo37b2obo$14b3o$11bo2b2o2b2o 31bo4bo$2bo8b2obo3b2o31b6o$bo2bo6bo2...

given that we have stabilised the corder engine, why can we not stabilise the pi engine? Such a spaceship would have a period greater than 10. If we allow ships that are not the minimum period, then we already have all orthogonal and diagonal speeds (see Speed Orthogonoid and Speed Demonoid ). slow...

Just curious, are we more likely to find a spaceship with speed: c/8o, c/9o, c/9d, 3c/10o, c/7k, c/8c? Note that c/7k and c/8c are very non-standard. You should rather write (2,1)c/7 and (3,1)c/8. This is a very hard question to answer. Without knowing anything else I would say lower period is more...

I object to those posts, replies, edit summaries where dvgrn puts themselves above the dispute, without honestly acknowledging that they're an involved party in this disagreement on the wiki content. Your idea that editors should not act as moderators in disputes in which they have been involved is...

I would appreciate it, if dvgrn... left any future administrative actions in this dispute for some other moderator or other moderators. This simply isn't a big enough community to be able to swap out moderators when there is a dispute. I for one have been too busy lately to do much moderation. I wi...

RT114 B-G Nice find, although it is a rediscovery (first posted here ). The top B-to-G is included in the elementary conduits collection, but I don't think the extension was ever included because it technically isn't a B-to-B, so there was nowhere to put it. It might be worth revisiting that decisi...

I used WLS to prove that there are no glide symmetric c/6 diagonal spaceships of diagonal width 24. This means that the following ship has minimal width among glide symmetric c/6 diagonal ships: x = 67, y = 68, rule = B3/S23 3o$3bo$o2bo$4bo$2b2o$5b2o7bo$5b3ob3ob3o$6bob2o6bob2o$6bo3bob4obo$9bo5b o4bo...

AlbertArmStain wrote: ↑

November 22nd, 2023, 4:05 pm

a filter I don't see in JSlife-moving

Interesting. Did you find this just now?

Thank you very much for this, I have added a table on the wiki with your results, LifeWiki:Spaceship Search Status Page#Known_spaceships_by_population .... I imagine the time for your proof of 37P4H1V0 's minimality and uniqueness could also prove or disprove that of non-monotonic spaceship 1 . The...

Haycat2009 wrote: ↑

November 23rd, 2023, 2:22 am

Honestly, you should try this to search for the minimum population of a c/8 ship.

Earlier in this thread, Amling said that the search couldn't even complete a c/7 orthogonal search beyond 3 cells. A c/8 search would be even less effective.

Barring bugs this confirms that the known pop 37 c/4 ship is the unique minimal c/4 ship. Great work! I've long suspected this, but I wasn't sure if anyone would ever find a way to prove it. I consider this, the 2c/5 result, and c/2 result to be some of the most exciting results of the last several...

This is too much like the previous "random posts" threads which were difficult to moderate. If you want to test a post, use the preview feature.

Thread locked.

While a greyship would be incredible, a slightly more achievable goal might be a wave stretcher. The following partial result is probably impossible to extend, but it gives an idea of what I'm talking about: x = 41, y = 52, rule = B3/S23 37b2o$36b2obo$35b2o2b2o$35b2o3bo$35b2o3bo$34b2o3bo$33bo3b2o$31...

Could this method be used to find the smallest completion to a partial result, or is it fundamentally limited to searching the whole space? The c/4 searches hit 60G RAM and died at pop 30. I've restarted them on my fanciest machine (where they can have 120G RAM), but based on how max memory usage is...

I have completed some extremely sketchy hacks for LLSSS that allow a carefully constructed inefficient search to nonetheless, in some cases, exhaust all ships below a certain population in finite time. That is barring mistakes or bugs, which of course there could be at many levels. This is exciting...

All by Nico Brown. p18 x = 21, y = 17, rule = B3/S23 6b2o$5bobo$b2o2bo$bobob2o$3bo$3b4o$b2o3bo3bo$o2b3o3bob2o$2obo5bo3bo$3b o6b4o$3b2o6bo5b2o$17bobo$10bo8bo$4b2obobobo7b2o$4bob2ob2obo$12bo$12b2o! Finally! I think this is the first known p18 that can complete the 7n+1 phase shift oscillator at p36 (...

I believe the general opinion is that we would start calling the 2-engine Cordership "natural" -- using the specific artificial definition of " natural " that we've got on the LifeWiki. Seems like it would maybe still be an engineered spaceship, though. I find it strange how a smaller spaceship lik...

Shrunk that gun_1232 further... I tried to shave off 1 row of the oscilator, and succeeded, but it cannot be used with the position of the eater as it stands: x = 28, y = 16, rule = LifeHistory 2$9.D2.D$2.A4.2D2A2D5.A$2.3A.D3.A6.A.A$5.A.3A3D2A2.A.A$2.2A.A.A2.D2.A .A.A.2A.2A$3.AB.A7.A.BA2.A.A$.A3.3B...

This c/6 partial has a lot of near-misses, when I try to complete it, but I can't find an actual completion: x = 54, y = 19, rule = B3/S23 $20bo11bo$19b3o9b3o$14b5o15b5o$14b4ob4obobobob4ob4o$14b2o3b2o3b5o3b2o 3b2o$4bo12b2o6bobo6b2o12bo$3bobo4b2o29b2o4bobo$3bob2o3bob2o25b2obo3b2o bo$3bo2bo3b4o25b4o3...

Before Sokwe's 2018 post, I have no evidence that people searched specifically for "dependent reflector"s In February 2012 I ran searches specifically for dependent reflectors (although back then the term wasn't in use). Here are two emails I sent to the LifeCA mailing list that I shamefully failed...

amling wrote: ↑

August 28th, 2023, 4:53 pm

the [now] 4c/8 east/west corner

Aren't they still 2c/4, or am I missing something?

The edge is compatible with 2c/4 east and 2c/6 north. Unfortunately the agar is p8 and doesn't have as much symmetry as one might like. The "best" plan to make something of this is still pretty bad. In rough order of increasing hopelessness: (*) Pick a stable p8 south edge. (*) Reflect it east/west...

nokangaroo wrote: ↑

August 28th, 2023, 6:03 am

132p37 as color-changing reflector

This reflection reaction can be seen on the wiki page for Beluchenko's other p37, along with a few 180-degree reflections.