ConwayLife.com

Longest c/8 diagonal partial so far: x = 41, y = 40, rule = B3/S23 4bo$2b2o$bobobo$3obo$o$b6o2bo$2b2o6bo$5bo3bo$6b3o$13b2obo$6bo5bo3bo$6b 2o3bo4bo$11bo3bo2b2o$8b2obo3bo3bo$8b2o5b4o$8b2obo$10b2ob3o$22b2o$12b2o 3b6obo$11bo6bobo3bo$11b3o3bo4bo$13bo4bo3b2o2$17b2o5bo$17b2o4b2o3b2o$ 22b2obobobo$23b3o2b3o...

creeperman7002 wrote: ↑

January 11th, 2021, 10:32 am

Still lives, even large and rare ones (!) are discarded in G1 soups. Large and rare still lives should be added to the census.

How would you efficiently determine whether the ash of a soup contains a large/rare still-life?

Transfer search resolved 130 unsynthed strict xs20, with 534 remaining (new syntheses submitted to catagolue, at time of posting haven't been processed yet)... That's a smaller number than I expected. Here are the 130 apgcodes for unsynthed xs20s in a code block (same as the attachment, just easier...

Using 3 gliders in the rectifier loop, we can get 8n+6 for n≥19 (lowest period is the disappointingly high 158): x = 101, y = 79, rule = B3/S23 8bo$7bobo$8bo2$6b5o$5bo4bo20b2o$4bo2bo23bo$bo2bob2o21bobo$obobo5bo18b 2o$bo2bo4bobo7bo3bobo$4b2o2bo2bo5bo2b2obobo$9b2o9bo3bo$16bo23b2o$16bo 2bo20bo$15bo2b2...

For periods of the form 8n+4, all p >= 92 are all possible. In particular, the following family gives you 148 and above (it just misses 140, because the p140 oscillator has minpop 141): x = 35, y = 35, rule = B3/S23 19b2o$10bo9bo7bo$10b3o7bobo3b3o$13bo7b2o2bo$12b2o12bo$24b2o$b2o14bo6bo $2bo13bobo$2b...

Apparently two isolated dots make up an xp3410. Bizarre. The actual apgcode is xp3410_l (lowercase 'L'). It looks like all of the invalid 1yr1 objects came from hauls with apgsearch v4.972, and the ones from apgsearch v4.98 contain no such problems: https://catagolue.hatsya.com/haul/b2-ae3aeiq4jnw5...

Is there any way to determine when and by whom the soups for the various period-8 c/2 ships here and p16 c/2 ships here were uploaded? I can't seem to get the attributes. Yes: go to the object page, then replace 'object' with 'attribute', then append '/ikpx2_stdin' to the URL: https://catagolue.hat...

313P7H3V0 eater partial... Completed fairly awkward but workable Anura eater / converter from Discord discussion, repeat time 1156: Bounding box and population reduction by eliminating a Snark and internal eater: x = 769, y = 135, rule = LifeHistory 88.A$88.3A$91.A22.A$90.2A20.3A$111.A$111.2A2$81.A...

The only objective function tracked by Catagolue is 'minimise the number of gliders'. Beyond that, it's completely arbitrary as to which synthesis ends up on the object page.

c/98o is clearly fast enough. What are you referring to? Probably this: x = 16, y = 31, rule = B36/S23 o2bob4o5bo$3obob2o3b3obo$o6b3o5bo$bo2b5o2b3o$obo3b2ob7o$4bo3b6obo$o2b 2o3bo2b5o$3bo2b3obo3bo$2obo2bo3b3o2bo$3b2o2bobobo3bo$bobo4bob6o$2o2bo 3bobo3b2o$2o6bob6o$3bo2b2o3b3obo$2bob3ob2o3bo$2bo2b3obo2...

Edit: Here's the rest of the cleanup. x = 140, y = 72, rule = B3/S23 54bobo$54b2o$55bo7$62bo$60b2o$61b2o4$138bo$137bo$137b3o12$23b2o101bo$ 22bo2bo4bo94bobo$14bobo6bobo4bo93bo2bo$15b2o7bo5bo94b2o$o14bo$b2o23b3o 3b3o$2o131bo$30bo90bo10bobo$30bo90bo7b2o2bo$30bo90bo5b3ob2o$126bo$127b 3ob2o$129bob2o3$20...

Another minor question: does KILLGLIDERS work on other rules where gliders exist, but where the diagonal speed limit is greater than c/4 and/or the orthogonal speed limit is greater than c/2? Are there any such rules? According to Catagolue , the maxrule for the glider is B2ikn34-r5-n678/S0234-k567...

Is that a deliberate rough approximation for efficiency reasons? To some extent yes. But the actual question is how do I know when it's safe to delete a glider? If there's a sufficiently wide (6 hd is definitely sufficient) diagonal strip* between the glider and the rest of the pattern, we can remo...

I'm going to look at creating some 'unit tests' for apgsearch: soups that test the correctness of the software in the presence of obscure edge cases. Here's one such case: an emitted NE glider collides into an eastward LWSS: https://catagolue.hatsya.com/hashsoup/G1/k_MVpSDDui2zMe3898947777/b3s23 The...

For some reason I thought my original central branch didn't work, but apparently it does... Nice! That might make it possible to change the orientation and save a few rows by building some kind of custom p84 gun where the red question mark is -- but only if a p7 sparker can be found that can be wel...

Here's a bounding box reduction to 247×209: 237 by 213 [EDIT: 236-by-213, using a p12 on the left] , including a bunch of fun tricks: A pi orbital (thanks, wwei23) which emits two useful Herschels, where the timings eventually worked out (after trying a metric ton of H-to-G converters) such that no...

There's currently a bug in which all of Google seems to be broken if you're logged in, which affects Catagolue as well.

You can avoid this by opening Catagolue in an 'Incognito tab' in Chrome or a 'private window' in Firefox.

is this a new climber, or has it been discovered already? It was discovered by Nicolay Beluchenko in 2006: #C 23c/69 fuse, tamed with use of c/3 technology x = 70, y = 261, rule = S23/B3 27boo$27boo22$27boo$27boo22$27boo$27boo22$27boo$27boo22$27boo$27boo22$ 27boo$27boo22$27boo$27boo10$22bo$21b3o$20...

Here's a completion of the central branch of the p7 Here's a completion of another branch, although it doesn't leave as much room as I'd like for the third and, I suspect, hardest branch. Well done! When completed, we'll (most likely) get a more compact p14 gun: x = 248, y = 209, rule = LifeHistory...

Repeat time 633: Repeat time 590 (and very Spartan as well!) by using the old 487-tick reflector: x = 178, y = 256, rule = LifeHistory 21.2A23.4B$22.A22.4B$22.A.AB18.4B$23.2AB.2A14.4B19.A$25.2B2AB12.4B.3B .B12.3A$25.4B6.18B10.A$25.6B3.16B2A2B5.B3.2A14.2A$26.6B2.16B2A2B3.8B 13.B2AB$26.7B.20B.8B16.2B...

interesting but useless pattern i found while messing with Gosper glider guns: I think that's Bill Gosper's 'five and dime' reaction from aeons ago. It tends to get rediscovered every so often, as evidenced by this recent (2009) discussion of the reaction: I showed two young brothers Golly and the ...

And why not buckaroos? That reduces the bounding box to 114-by-114: x = 114, y = 114, rule = B3/S23 20bo44b2o$20b3o42b2o$23bo$22b2o$62b2o$62b2o2$31bo33b2o$11b2o5b2o9b2obo 32b2o$11b2o5b2o8bo4bo39b2o$32bo40bo$15b2o11b4o39bobo30b2o$15b2o54b2o 31b2o$55bo$54bobo$53b2ob2o$38b2o14bo2bo39bo$38b2o14bo3bo37b...

The left corner can be completed using halfmax: So can the bottom, so it's only the top part that's remaining: x = 195, y = 353, rule = B3/S23 140bo7b2o$140bobo6bo$140bob2o5b2o$140bobobo$140bobob2o$140bobo3bo$140b o$140bob2ob2o$140bo$140bo2bo3b3o$140bobo6bo$140bob2o$131bo4b2o2bobo6b 2o$130bob3o3bob...

How can making the two glider lanes be from different directions instead of from the same direction make the search tree both harder to search and finite? I would think that the search tree would expand at a greater rate due to the removal of the Fibonacci restriction. It's not the different-direct...

If there's a way to coax gliders out of the p41 wick (e.g. from finding a p46-gun-style head-on interaction between two copies of the wick), then it should be possible to create a closed p41 oscillator (and gun!) by means of the stable 135-degree MWSS-to-G converter (which works at p41). How would ...