ConwayLife.com

Jason Summers

I tried to complete a c/4 diagonal wickstretcher, and found what I thought was a breakthrough, but I just can't make it work. Can anyone help finish it? x = 72, y = 81, rule = B3/S23 39bo$38boo$38bobo$$41boo$41boo$32b3o$32bo3booboo$35bob3obo$32bo3b3obbo $27boo4bobo$26boo6bo29bo$28bo$30bo3boo$23boo4b...

Jason Summers

I've been working on cleaning up my old WinLifeSearch program a bit, and have made a new release of it, v0.70. Main site Development It has a lot of minor fixes, but no major changes, and no changes to the search algorithms. I haven't decided to what extent I'll keep working on this. I'm interested ...

Jason Summers

I don't know about a database of reactions that could be combined. It sounds good at first, but without some new idea, there are just too few useful reactions available, and too many miracles that would have to occur. I think that searching for a new or overlooked reaction is probably a better bet t...

Jason Summers

Sokwe wrote:Are there any known p4 oscillators in which every cell oscillates at period-4?

No, the only such periods known to me are 1, 2, 3, 6, 8, 13, 15, 30, 33, and 177.

Jason Summers

I found this p3 oscillator that has no stable cells. I think it's the first one known. x = 31, y = 28, rule = B3/S23 9bobo5bo3bo5bobo$8bo3bo4bo3bo4bo3bo$9bo7bo3bo7bo$11b2ob2obo3bob2ob2o$ 17bo3bo$10bo3bo9bo3bo$8bobo17bobo2$8bo19bo$7b2o18b2o$7bo19bo$5bo2bo16b o2bo$o4bo14bo4bo$4ob2ob3o9b4ob2ob3o$3ob2ob...

Jason Summers

Does the puffer move left, or right? I don't know of any scripts that would help, but it looks straightforward to construct. I'd use rakes plus these reactions, if possible: .*****...............**** *....*..............*...* .....*..................* *...*...............*..*. ..*......................

Jason Summers

I just wondered whether I have inadvertently discovered any new mechanisms. (a) p48 back rake, using a Schick engine This is larger than known technology; see the c2-extended/c2-0048.lif file in my jslife collection . But the glider release position (at the side) is good, and maybe it could be opti...

Jason Summers

Some more details: The prime number patterns all work by testing odd numbers for odd factors. None of them tests even numbers. Some small numbers, like 2, are handled as special cases (i.e., totally faked). They work by constructing a row of oscillators (or oscillating components) of ever-increasing...

Jason Summers

To clarify, this is not a way to find completely new puffers. You have to start with a known puffer or near-puffer, and it will try to find different ways that its smoke can stabilize.

Jason Summers

It's nice, but what might be more useful is a similar search for other rules. It is only feasible to find small puffers, and life has been well searched. I've used random-perturbation scripts like this to find a number of new stable "orbits" into which a puffer's output can fall. The puffer doesn't...

Jason Summers

Wojowu wrote:Is there a chance for Python version?

It ought to take about half an hour to translate the script to Python. Maybe someone will volunteer? I could probably do it, but I'm a lot more comfortable with Perl than Python.

Jason Summers

Here's a Golly script I wrote to search for new switch engine puffers; i.e., anything other than the p288 "block maker" or the p384 "glider producer". seo-search.zip This is a long shot at best -- I've mostly given up on it, but I think there's still a chance of success. It requires Perl scripting s...

Jason Summers

I think so, too... Does WLS uses the best algorithm, currently? I'm not aware of any breakthroughs in this type of searching. Of course, there are many ways to optimize it. But fundamentally, it's all just brute force: try all possibilities, and eliminate the ones that lead to a contradiction. If s...

Jason Summers

Here is Hickerson's classification of the symmetries of finite oscillators, from his "stamp collection": There are 43 types of symmetry that an oscillator can have, taking into account both the symmetry of a single generation and the change of orientation (if any) M generations later. There are 16 t...

Jason Summers

This is a pathological case where most of the usual glider-insertion methods fail. But there are countless ways to collide gliders and spaceships to produce a glider. Some of them are bound to work, such as x = 321, y = 146, rule = B3/S23 133bo$133bobo$133boo10$16boo$16bobo$16bo$3o$o116bo$bo115bobo$...

Jason Summers

There are many ways that a glider can suppress the switch engine smoke, but this might be the only one that lets your sideways glider slip past: x = 211, y = 177, rule = B3/S23 172boo$171bobo$173bo6$179b3o$181bo$180bo6$140boo$139bobo$141bo5$109b3o $110bo36b3o$110bobbo35bo$110bobbo34bo$111bobo4$128b3...

Jason Summers

I put together a Windows build of Paul Callahan's "gencols" program. It can be downloaded at < http://entropymine.com/jason/life/gencols/gencols-js-1.00.zip >. (Gencols is a search program that enumerates collisions between Life patterns, to find collisions that have certain properties.) Be warned t...

Jason Summers

I'm not sure if I'm reading your mind correctly... x = 58, y = 31, rule = B3/S23 13bo3bo20bo5bo6bobbo$bo3bo7booboo7boo3boo8bobo9booboo$booboo6bobobobo 6boo3boo8bobo7boobobbo$obobobo5bobobobo5bobbobobbo16bo3boboo$obobobo 17bobbobobbo6booboo5bobo3bobo$13bo3bo21booboo7bobbo$bo3bo7booboo7boo3b oo6bo5bo7...

Jason Summers

I've attached a zip file with several agars that look like they might be tamable. Here's a new period 12 oscillator, made from one of the agars: x = 35, y = 35, rule = B3/S23 10boo8boo$9bobbo7boo$4boo3boobobboo$4bobbobobbobobo$booboboobobbobo$bb obobbob3obbobo8bo$bobboo3bo7bo6bobo$bobobboo6bo5boobo...

Jason Summers

Here's a predecessor of the p32 oscillator that I recently found which looks like it would allow a glider synthesis Here's a synthesis from 37 gliders. x = 89, y = 109, rule = B3/S23 10bo67bo$bobo7boo63boo7bobo$bboo6boo65boo6boo$bbo83bo3$12bobo59bobo$ 13boo59boo$13bo61bo5$67bo$65boo$66boo3$7bo$8bo$...

Jason Summers

knightlife wrote:If there were a different way to "inject" a boat into its proper place with 3 gliders from only two directions instead of three then the glider count could be reduced by at least 2.

Here's one way:

Code: Select all

x = 10, y = 9, rule = B3/S23
7bo$7bobo$7boo3$5bo$bbobbobo$obobboo$boo!

Jason Summers

I'll have to guess that the answer to both of your questions is no, unless you count this diagonal spaceship in a B0 rule:

Code: Select all

#C 3c/4 diagonal (David Eppstein, 2002)
x = 6, y = 3, rule = B02357/S2356
b2o$o2b3o$ob4o!

Jason Summers

Here are some predecessors of some large oscillators that might be synthesizable (p9, p16, and p51): The p51 can be done by brute force, if nothing else. x = 77, y = 77, rule = B3/S23 69bo$69bobo$69boo3$bo$bbo$3o12bo27bo$16boo26bo$15boo25b3o17bobo$62boo$ 63bo$9bo28bo$10boo27bo$9boo26b3o17bobo$27bo2...

Jason Summers

Can anyone find a custom p6 sparker to complete this p42 oscillator? x = 44, y = 20, rule = B3/S23 9boo22boo$5boobbobo5boo6boo5bobobboo$4bobbobobo5boo6boo5bobobobbo$4bob obboboo18boobobbobo$3booboobo8bo13bobb3oboo$6bobbooboo3bobo12boobobbo bbo$3boboobboo5bo3bo10bo5bobboo$oboobobo6bobo3bo10b4obo5bo$3...

Jason Summers

With an alternate p2 part, one of the 3c/6 spaceships can delete blocks. It's pretty bulky, but I think that's a first. x = 52, y = 78, rule = B3/S23 35b3o$31b5obbo$27booboobobo3bo$25boobo3bo6bo$oo19b5o4bo6bo$oo15booboob obobo3bo6bobo$15boobo3bo3bo8booboboo$11b5o4bo14boobobobo$10boobobobo3b o13bobbo...

ConwayLife.com

Search found 36 matches

Wickstretcher partial result

WinLifeSearch update

Re: Spaceships that are built from common reactions

Re: Statorless p3 oscillator

Statorless p3 oscillator

Re: script for puffer producing given output

Re: Glider/**SS Reactions

Re: The theory behind Primer?

Re: Switch engine puffer search script

Re: Switch engine puffer search script

Re: Switch engine puffer search script

Switch engine puffer search script

Re: Developing WLS

Re: Oscillator glide symmetry classes

Re: How to get two gliders in place for a gun

Re: How to get two gliders in place for a gun

gencols

Re: Assisted Lightspeed Wicks

Re: Agar stabilization discussion

Re: Glider synthesis discussion

Re: Glider synthesis discussion

Re: Ships with speed between c/2 and c

Re: Glider synthesis discussion

Re: Incomplete search patterns - try to complete

Re: Some new spaceships.