Search found 87 matches

by Dean Hickerson
May 7th, 2019, 4:40 pm
Forum: Patterns
Topic: Close-passing p60 MWSS streams
Replies: 1
Views: 7948

Re: Close-passing p60 MWSS streams

It's well known (and I think due to Dean Hickerson) that p120 MWSS streams can pass close in opposite directions so that the bits can be inverted and turned back by eaters at both ends in a recirculating loop. I just noticed this post from a few weeks ago. I don't remember seeing that p120 loop bef...
by Dean Hickerson
March 9th, 2019, 6:38 pm
Forum: Patterns
Topic: Mountain range patterns
Replies: 12
Views: 8258

Re: Mountain range patterns

In christoph r.'s wallstreet patterns, it appears that most (but not quite all) of the gliders from the northernmost glider rakes survive to reach the LWSS line. There they delete almost half of the LWSSs. So I wondered if we could get the same effect by eliminating those 2 rakes and replacing the p...
by Dean Hickerson
March 8th, 2019, 9:24 am
Forum: Patterns
Topic: Mountain range patterns
Replies: 12
Views: 8258

Re: Mountain range patterns

Is it possible to arrange the rakes to have there be more than one kickback reaction (i.e. so that the kickbacked gliders from NW create another kickback glider at the "13N" collision)? It can be done, but I don't know if any interesting patterns can be built that way. Here's one that I looked at a...
by Dean Hickerson
March 8th, 2019, 9:13 am
Forum: Patterns
Topic: Mountain range patterns
Replies: 12
Views: 8258

Re: Mountain range patterns

Here's one that looks like it works. Does it generate a sequence with its output gliders? With a few assumptions and a messy calculation, it should be possible to determine the slopes of the glider lines, the densities of LWSSs that get past W and E, and the speed at which the collision point C mov...
by Dean Hickerson
March 8th, 2019, 8:44 am
Forum: Patterns
Topic: Mountain range patterns
Replies: 12
Views: 8258

Re: Mountain range patterns

At that post i added a north moving rake on each side. christoph r.: The first pattern in your post in this thread is broken, but the one in your 2016 post works fine. (P.S.: The problem is a couple of spaces in the middle of a line in the RLE. Curiously, the forum's pattern viewer can read it, but...
by Dean Hickerson
March 7th, 2019, 6:59 pm
Forum: Patterns
Topic: Mountain range patterns
Replies: 12
Views: 8258

Mountain range patterns

While experimenting with variations of my old "jagged lines" pattern from 2005 http://conwaylife.com/wiki/Jagged_lines , I found some patterns that grow mountain ranges. Most of these are what I call "witch's hat" patterns because of their general shape. They consist of 2 LWSS rakes moving east and ...
by Dean Hickerson
June 16th, 2018, 9:18 am
Forum: General Discussion
Topic: Life Lexicon update -- now Release 29, 2 July 2018
Replies: 164
Views: 66021

Re: Life Lexicon update -- now Release 29, 2 June 2018

:trivial: Maybe it should be mentioned that there are nontrivial examples of trivial oscillators, There are also trivial examples of nontrivial oscillators, in which 2 oscillators don't interact, but their rotors overlap, so that the periods of cells in the overlap are larger than the periods of th...
by Dean Hickerson
June 14th, 2018, 4:32 am
Forum: General Discussion
Topic: Life Lexicon update -- now Release 29, 2 July 2018
Replies: 164
Views: 66021

Re: Life Lexicon update -- now Release 29, 2 June 2018

Most of the patterns shown have dots added to the ends of their lines to make all lines the same length. But there are 4 exceptions: :anvil: :cis-beacon on anvil: :LWSS: :sesquihat: [/b] A few more comments: :Fast Forward Force Field: In last paragraph, there should be a space after "Forward.". :osc...
by Dean Hickerson
July 23rd, 2017, 1:04 am
Forum: Other Cellular Automata
Topic: Larger than Life
Replies: 278
Views: 139227

Re: Larger than Life

Here's a strange phenomenon that occurs in some LtL rules: "temporary spaceships". The object below moves steadily to the southeast for 2572 generations, and then suddenly stops: #C Moves southeast with speed about 0.08 until generation 2572, when #C it becomes a p2 oscillator. x = 50, y = 50, rule ...
by Dean Hickerson
July 17th, 2017, 2:38 pm
Forum: Other Cellular Automata
Topic: Larger than Life
Replies: 278
Views: 139227

Re: Larger than Life

Here's the slowest yet, an orthogonal spaceship with range 43: #C Speed 9/121716 orthogonal spacehip ... This one is even slower: # Speed 1/40368 orthogonal spaceship x = 78, y = 81, rule = R39,C0,M1,S2174..3710,B1884..3748,NM 43bo$47bo$29bo17bobo$26b2o20b4o$24b3o22b5o$22b4o10b5o9b6o$21b4o5b16o5b 6...
by Dean Hickerson
July 11th, 2017, 7:14 pm
Forum: Other Cellular Automata
Topic: Larger than Life
Replies: 278
Views: 139227

Re: Larger than Life

Also, what's ORing? Oring, or Or-ing? Or-ing. It's one of the paste modes in Golly; you can cycle between the 4 modes by pressing "M". If you paste the clipboard into an existing pattern in Or-mode, then a cell will be present if it was already present OR if it's present in the clipboard. You can a...
by Dean Hickerson
July 10th, 2017, 4:08 am
Forum: Other Cellular Automata
Topic: Larger than Life
Replies: 278
Views: 139227

Re: Larger than Life

Also, who can find the first bug in Bugs Range 50? (Convert using my script/Dean Hickerson's algorithm) Here's one: #C Symmetric spaceship that moves southeast with speed 3000/929 ~ 3.229 x = 92, y = 92, rule = R50,C0,M1,S2866..4890,B2866..3794,NM:T10000,10000 36b14o$33b20o$31b24o$29b28o$27b32o$25b...
by Dean Hickerson
July 8th, 2017, 9:30 am
Forum: Other Cellular Automata
Topic: Larger than Life
Replies: 278
Views: 139227

Re: Larger than Life

How are you finding these? I don't remember how I found the first one, back in 2002. For the others, I've just made minor changes to that rule (including rescaling as I mentioned here ), and then tried random stuff. Most stuff either dies out or turns into an oscillator, but occasionally slow space...
by Dean Hickerson
July 7th, 2017, 3:45 am
Forum: Other Cellular Automata
Topic: Larger than Life
Replies: 278
Views: 139227

Re: Larger than Life

Rule R3,C2,M1,S7..19,B12..23,NN supports a rich set of oscillators. ... Oscillators with periods 2 thru 26 have now been found. Here are some more; the first missing period is now 45. (Although it's not listed in your post, your collection includes a p44 oscillator.) x = 203, y = 92, rule = R3,C0,M...
by Dean Hickerson
July 6th, 2017, 1:18 am
Forum: Other Cellular Automata
Topic: Larger than Life
Replies: 278
Views: 139227

Re: Larger than Life

Can anyone find anything slower? Or maybe a slow knightship? Here's the slowest yet, an orthogonal spaceship with range 43: #C Speed 9/121716 orthogonal spacehip x = 88, y = 89, rule = R43,C0,M1,S2657..4491,B2268..4554,NM:T4000,4000 47b5o$50b5o$52b6o$54b6o$32b2o21b7o$30b3o23b8o$28b4o25b8o$27b4o10b1...
by Dean Hickerson
July 4th, 2017, 10:48 am
Forum: Other Cellular Automata
Topic: Larger than Life
Replies: 278
Views: 139227

Re: Larger than Life

Dean, is there a trick to find good "blobby" rules? The only method I know of is to start with an interesting rule and then make small changes to the birth and survival limits, or change the range. If you change the range from r0 to r1, then the birth and survival limits should be multiplied by (2*...
by Dean Hickerson
July 4th, 2017, 5:10 am
Forum: Other Cellular Automata
Topic: Larger than Life
Replies: 278
Views: 139227

Re: Larger than Life

First, thanks to Andrew Trevorrow for implementing Larger than Life in Golly! I've wanted something like this for years. Some LtL rules contain very slow spaceships, like this speed 2/1846 diagonal spaceship in a range-10 rule, which I found in 2002. (This is included in the new Golly distribution.)...
by Dean Hickerson
December 18th, 2016, 1:12 am
Forum: Patterns
Topic: 4 glider syntheses
Replies: 122
Views: 170133

Re: 4 glider syntheses

The 5 glider synthesis was find by Dean hickerson, but unfortunately, I don't know when, as that annotation was from when I was noting who found the most recent synthesis, but not dates of discovery, nor any earlier information. I now keep track of discoverer and date for each improvement, but I ha...
by Dean Hickerson
June 1st, 2016, 4:44 am
Forum: Patterns
Topic: Thread for your unsure discoveries
Replies: 1728
Views: 839271

Re: Thread for your unsure discoveries

A pair of blocks can eat a LWSS:

Code: Select all

x = 12, y = 7, rule = B3/S23
9b2o$9b2o2$o2bo$4bo5b2o$o3bo5b2o$b4o!
This seems like it ought to be well-known, but I don't think I've seen it before. It showed up spontaneously in a large pattern that I was running.

Has anyone seen it before?
by Dean Hickerson
May 8th, 2016, 12:18 am
Forum: Patterns
Topic: Usually small sawtooth pattern
Replies: 15
Views: 8359

Re: Usually small sawtooth pattern

This is intended as a proof of concept; obviously it could be compressed quite a bit, and the old p120 guns should be replaced by Simkin guns. (And if recent experience is any guide, someone will suggest a simpler solution which will make this obsolete.) I thought of a better way. The pattern below...
by Dean Hickerson
May 5th, 2016, 7:57 pm
Forum: Patterns
Topic: Syntheses of Unusual Still Lifes
Replies: 78
Views: 59241

Re: Syntheses of Unusual Still Lifes

x = 58, y = 43, rule = B3/S23 bo54bo$2bo52bo$3o52b3o6$11bo34bo$12bo32bo$10b3o32b3o$21bobo10bobo$22b 2o10b2o$22bo12bo5$25bobo2bobo$26b2o2b2o$26bo4bo2$26bo4bo$26b2o2b2o$25b obo2bobo5$22bo12bo$22b2o10b2o$21bobo10bobo$10b3o32b3o$12bo32bo$11bo34b o6$3o52b3o$2bo52bo$bo54bo! Nice! Adding 4 more gliders co...
by Dean Hickerson
May 5th, 2016, 11:53 am
Forum: Patterns
Topic: Usually small sawtooth pattern
Replies: 15
Views: 8359

Re: Usually small sawtooth pattern

I was thinking what if we use parabolic sawtooth - but trigger it with returning glider (like your design but with parabolic sawtooth)? Wouldn't it make the "sawtooth teeth" which are linearly growing, being spread out in linearly distant intervals, thus making the system with constant density? It ...
by Dean Hickerson
May 4th, 2016, 9:30 pm
Forum: Patterns
Topic: Usually small sawtooth pattern
Replies: 15
Views: 8359

Re: Usually small sawtooth pattern

I've also published push3r - together with pretty large amount of mess here . Thanks; I'd missed that. I'm looking through the results now; it looks like we now have 2-glider and 3-glider pushes for all distances from 1 to 10 and pulls for all from 1 to 8. That gives a lot more possibilities for sq...
by Dean Hickerson
May 3rd, 2016, 7:51 pm
Forum: Patterns
Topic: Usually small sawtooth pattern
Replies: 15
Views: 8359

Re: Usually small sawtooth pattern

I wonder if there is a way to control the density of the "highs" and "lows"? Say is there a sawtooth which is exactly half of the time in "small" state? If half is hard, at least some number which is not 0 nor 1. I was wondering that too, and I think I've figured out a way to get density between 0 ...
by Dean Hickerson
May 2nd, 2016, 7:29 pm
Forum: Patterns
Topic: Syntheses of Unusual Still Lifes
Replies: 78
Views: 59241

Re: Syntheses of Unusual Still Lifes

This has probably been found before: A symmetric collision of 4 gliders make 2 tubs with tail:

Code: Select all

x = 17, y = 12, rule = B3/S23
7bo$obo2bobo$b2o3b2o$bo5$15bo$9b2o3b2o$9bobo2bobo$9bo!