ConwayLife.com

Here's an idea for finding a period-7 3c/7 rake that might be feasible... ...you might be asking for "K-gram" edges... The most common problem with this sort of use is nothing forces the transition to actually happen and so your search may just keep on forever before the critical point. Indeed. I r...

dvgrn wrote: ↑

Yesterday, 2:45 pm

...a scraped copy of all forum messages...

Yes! Where do I sign up for that? Is there an API? Conceivably I could even have a script updating velocity tags on my posts automatically so I don't have to remember...

Most recently I wanted to find all posts of mine containing the string "(2, 1)c/5" but phpBB search is fixated on words of which that string contains none longer than one letter (which phpBB refuses to search). At least for something like 4c/8 I could filter for "4c" and read whatever showed up (inc...

Does anyone have an example of one vacuum-incompatible velocity dragging another? To rule out trivial examples I would probably demand they not be collinear and that both sides have their own bit of signal distinct from the wave-like signal joining them. ... I would also accept examples where the w...

(about c/4d catalysts for lighting fuses) Overnight (run to 8G) the most interesting thing that dropped out is probably this: x = 545, y = 24, rule = LifeHistory F33.F33.F33.F33.F33.F33.F33.F33.F33.F33.F33.F33.F.3BABA22B4.F.3BABA 22B4.F.3BABA22B4.F.3BABA22B4.F$F33.F33.F33.F33.F33.F33.F33.F33.F2.3BA...

I had been looking again at trying to use a 4c/8 pattern to solve the 2c/4 x 2c/1 sideways back problem (which would also allow level 4c/8 greyship backs). Definitely still work in progress but this fairly long partial I thought was worth posting: x = 395, y = 125, rule = B3/S23 ob391obo$obobo385bob...

It's simply a matter of finding a sparker that allows the glider to pass through cleanly. This partial result shows that it's possible: x = 45, y = 37, rule = B3/S23 40bo$39b3o$28b2o8b4o$27bobo$29bo6b3o$34b2ob2o4b2o$35bob2o$32b2obobo$ 32bo2b2o$26b3o3b3o6b2o$26bo3bo9b2o$27bo12b2o$25bo2bobo$24bobobo$...

Keith, can you try to reduce this sparker: x = 43, y = 39, rule = B3/S23 7b2o$7bobo$2o5bo$obo3b2o2bo$o11bo$3bo3b2o3b3o$3b2o4b2o4bo$9b7o$10b4o$ 17bo$16b4o$20bo$15b6o$9b3o3bob2o$9bo5bobo$10bo2b2ob2o$12bo14b3o$15bo3b o7bo$13b2o4bobo8bo$19bo7bo4bo$21b3o4b3o$23bob2o5bobo$25bo8bo$17b2o3b3o 10bo$17bobo2b2...

I'm more a "make a giant, messy solution" sort of guy or maybe occasionally a "optimize one direction of clearance at the extreme expense of every other metric" sort of guy. What are you hoping to use a "reduce"d version of this in? I could try to optimize the NW clearance similar to the other spar...

x = 184, y = 105, rule = LifeHistory 7.3A$7.A$3A6.A$A6.A.A$.A4.2A.4A$3.4A.5A.2A$4.2A7.2A.A2$17.A$17.A$16.A 2.2A23.2A$16.A.2A.A21.2A$10.2A4.2A27.A$10.A.A2.3A29.2A$10.A3.A31.A$ 13.2A3.A9.2A$13.A4.A9.A.A14.A2.A$20.A7.A8.2A5.2A$14.2A4.2A7.3A4.2A5.A $23.2A4.A.3A4.A4.A.A$23.3A.A4.A7.2A2.A$30.2A2.A5.2A$23...

x = 184, y = 105, rule = LifeHistory 7.3A$7.A$3A6.A$A6.A.A$.A4.2A.4A$3.4A.5A.2A$4.2A7.2A.A2$17.A$17.A$16.A 2.2A23.2A$16.A.2A.A21.2A$10.2A4.2A27.A$10.A.A2.3A29.2A$10.A3.A31.A$ 13.2A3.A9.2A$13.A4.A9.A.A14.A2.A$20.A7.A8.2A5.2A$14.2A4.2A7.3A4.2A5.A $23.2A4.A.3A4.A4.A.A$23.3A.A4.A7.2A2.A$30.2A2.A5.2A$23...

Keith ... can you try to reduce this sparker: x = 43, y = 39, rule = B3/S23 7b2o$7bobo$2o5bo$obo3b2o2bo$o11bo$3bo3b2o3b3o$3b2o4b2o4bo$9b7o$10b4o$ 17bo$16b4o$20bo$15b6o$9b3o3bob2o$9bo5bobo$10bo2b2ob2o$12bo14b3o$15bo3b o7bo$13b2o4bobo8bo$19bo7bo4bo$21b3o4b3o$23bob2o5bobo$25bo8bo$17b2o3b3o 10bo$17bobo...

Some very preliminary searching can turn it e.g. at that first NW branch: x = 27, y = 42, rule = B3/S23 11b3o$11bo$2bo11bo$b2o8bo4bo$bobo8b3o$9bo6bobo$4b2o2bob2o6bo$5bo2bo2bo 7bo$4bobo13bo$3bo4bo2bo8bobo$3bo3b2o$3b5o3bo10b2o$4b3obo4bo9bo2bo$5bob ob2ob3o$4bo2bobob4o7b2o2bo$4bo17bo$4bo3bo$b2o3bobob2o...

x = 184, y = 105, rule = LifeHistory 7.3A$7.A$3A6.A$A6.A.A$.A4.2A.4A$3.4A.5A.2A$4.2A7.2A.A2$17.A$17.A$16.A 2.2A23.2A$16.A.2A.A21.2A$10.2A4.2A27.A$10.A.A2.3A29.2A$10.A3.A31.A$ 13.2A3.A9.2A$13.A4.A9.A.A14.A2.A$20.A7.A8.2A5.2A$14.2A4.2A7.3A4.2A5.A $23.2A4.A.3A4.A4.A.A$23.3A.A4.A7.2A2.A$30.2A2.A5.2A$23...

Interesting (?) that it took so much less time than the pop 57 odd-symmetric search. I did look into this a little but nothing really stands out. To a first approximation almost all search time for both was in `l2r_weights` in running the min pop filter and averaged close to 3200% CPU over the enti...

2c/5 even searches completed for pop 60 in all five phases: max memory 97.8 GB, total time ~26.5h. Found (blah blah barring bugs exhaustive collection of pop 60 2c/5 even patterns) only doubles of 30P5H2V0.

2c/5 odd searches completed pop 57 in all five phases with a max memory of 79.7 GB and a total time of 13 days. Found only 44P5H2V0 and the known pop 57 ship and barring bugs this is a complete accounting of 2c/5 odd patterns of pop 57 or less.

Well, I didn't investigate this question, but if B2a3i/S12 doesn't have any p3 oscillators, there won't be any results regardless of how much RAM is available, right? It might be easier/cheaper to disprove them. This was an arbitrary width search I was running under the assumption that they don't e...

I'm now going to leave the arbitrary width B2a3i/S12 p3 search running for a bit since the box is only 15 cents an hour. My fancier computer had taken just 18 minutes to fill 120 GB and die so maybe we'll see if this EC2 box can get anywhere on that question overnight. This sort of thing (a search ...

I'm toying with a slight rework of how edges work in recentering searches. It's gonna take some explaining and will probably be best to think about in terms of the problem I want it to solve. Often when searching I have a prompt like this, with a branch I need to solve and neighboring branch, someti...

I got something like the second solved but it's not clear if it will actually be useful as the branches on that back (east) side are pretty big and possibly in the way. Wow, that's some crazy branching! However, I think it will be useful. The following high-period chaotic puffer seems to have a bas...

2c/7 puffer engine partial (the puffer will destroy itself, so we need to find something that can stabilize that too): x = 45, y = 54, rule = B3/S23 5$3bo12bo7bo12bo$2b3o10b3o5b3o10b3o$2b3o10b3o5b3o10b3o3$5bo3b2o3bo11bo 3b2o3bo$3bob4o2b4obo7bob4o2b4obo$3bob4o2b4obo7bob4o2b4obo2$7b6o15b6o$ 6b2o4b2o1...

The absolute ideal is probably a fuse ignition by a passing p4 catalyst-type ship... Is it too much to hope for a lucky still life output from the fuse-burning-ending reaction? E.g. if it could leave a loaf by the back end of the now-unlit-fuse like so... x = 109, y = 177, rule = B3/S23 8b2o$7b2o$9...

The absolute ideal is probably a fuse ignition by a passing p4 catalyst-type ship, but that seems like it's probably well beyond even Amling's abilities at the moment. I'm gonna plan to run search lines from 2 to 7 generations of interaction and perfect back clearance (better chances of surviving r...

It's hard to produce meaningful 3c/7 partials quickly, but a complete walk-through of a possible setup for this with floating K-gram edge is as follows: `1.in`: | | | | | | ... | ... | | | | | ... | ... | ... | ... | | ZZZ | ... | ... | ... | ... | ... | | | ... | ... | ... | | | | | | ... | | | | |...