Search found 309 matches

by Book
Yesterday, 2:43 pm
Forum: Patterns
Topic: Seeking Sawtooth Truth
Replies: 17
Views: 548

Re: Seeking Sawtooth Truth

Sawtooth 633
Formulas check out except that the formula for the lower saw bound starts at n=2 (not n=1) which I have corrected.
by Book
Yesterday, 1:01 pm
Forum: Patterns
Topic: Seeking Sawtooth Truth
Replies: 17
Views: 548

Re: Seeking Sawtooth Truth

I think the expressions in Cord puller come from comments to CORDPULL.LIF in the linked pattern collection lifep.zip.
Yes! And thanks for clearing up the reference.

The pattern in the lif file is the same as that in the wiki, which I believe is the revised (9/94) version.
by Book
September 26th, 2022, 9:48 pm
Forum: Patterns
Topic: Seeking Sawtooth Truth
Replies: 17
Views: 548

Re: Seeking Sawtooth Truth

Cord Puller The pattern shown in the cord puller wiki article appears to be the 9/11/94 revision to the 5/14/91 pattern, as described in DRH saw.tractor.html (we may no longer have access to the original 5/14/91 RLE). The formulas shown in the wiki article appear to be incorrect. They are not the f...
by Book
September 26th, 2022, 1:05 pm
Forum: Patterns
Topic: Seeking Sawtooth Truth
Replies: 17
Views: 548

Re: Seeking Sawtooth Truth

So here is where I think we are with the mystery DRH gave us in 1991 (this could be the plot of a British mystery with enigmatic clues): 1. We have a Sawtooth 1209 pattern whose saw behavior toroidalet has calculated. 2. We have the description of what appears to be a Sawtooth 1212 but we do not hav...
by Book
September 25th, 2022, 7:55 pm
Forum: Patterns
Topic: Seeking Sawtooth Truth
Replies: 17
Views: 548

Re: Seeking Sawtooth Truth

FWIW here's another source of that sawtooth http://radicaleye.com/lifepage/patterns/sawtoot3.html With the good old Life 1.05 format that seems to indicate its age Just to be clear, the lif file at the link contains the exact same pattern as the sawtooth 1212 rle. And the formulas in the lif file a...
by Book
September 25th, 2022, 4:35 pm
Forum: Patterns
Topic: Seeking Sawtooth Truth
Replies: 17
Views: 548

Re: Seeking Sawtooth Truth

So Sawtooth 1212 is not Sawtooth 1212 and the article needs some work.
by Book
September 24th, 2022, 4:44 pm
Forum: Patterns
Topic: Seeking Sawtooth Truth
Replies: 17
Views: 548

Re: Seeking Sawtooth Truth

Sawtooth 1212 1. The formula for min pop is as follows: "population in generation 6(21^n) + 193 (n ≥ 1) is only 1212" however the population shown by Golly is 1231 for each of n=1 (t=319), n=2 (t=2839), n=3 (t=55759), n=4 (t=1167079) 2. The formulas for peak pops seem problematic: "population in ge...
by Book
September 20th, 2022, 2:18 pm
Forum: Patterns
Topic: Seeking Sawtooth Truth
Replies: 17
Views: 548

Re: Seeking Sawtooth Truth

Thanks all. To Golly for truth.
by Book
September 20th, 2022, 1:36 pm
Forum: Patterns
Topic: Seeking Sawtooth Truth
Replies: 17
Views: 548

Re: Seeking Sawtooth Truth

Hacksaw The wiki article read: "the population in generation 1155(9^n-179) (n>=0) is only 977" which is clearly wrong, it gives negative results for 0,1,2. I assumed it was a typo, because DRH says "the population in generation 1155(9^n)-179 (n>=0) is only 977" which is correct for n=0, t=976 and p...
by Book
September 20th, 2022, 1:27 pm
Forum: Patterns
Topic: Seeking Sawtooth Truth
Replies: 17
Views: 548

Seeking Sawtooth Truth

While adding sawtooth sequences to the integer sequences wiki article, I have come across a number of apparent errors in the wiki sawtooth articles. The purpose of this thread is to provide a place to surface these errors and hopefully get them fixed. Or perhaps find out I am misreading or misapplyi...
by Book
September 16th, 2022, 5:47 pm
Forum: Patterns
Topic: Belated Pattern of the Year 2012 voting thread
Replies: 15
Views: 762

Re: Belated Pattern of the Year 2012 voting thread

#01 **
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by Book
September 7th, 2022, 3:41 pm
Forum: Website Discussion
Topic: Suggested LifeWiki edits
Replies: 527
Views: 122191

Re: Suggested LifeWiki edits

jslife redirects to Jason Summers, I suggest a disambig for Jason Summers and jslife-moving (the latter may need a page).
by Book
September 4th, 2022, 7:08 pm
Forum: Website Discussion
Topic: Suggested LifeWiki edits
Replies: 527
Views: 122191

Re: Suggested LifeWiki edits

pzq_alex wrote:
September 4th, 2022, 6:57 am
The “drifter version” of the Eater 3 is not on the wiki, despite it being mentioned in p71 honey farm hassler.
added to gallery
by Book
September 4th, 2022, 6:34 pm
Forum: Website Discussion
Topic: Suggested LifeWiki edits
Replies: 527
Views: 122191

Re: Suggested LifeWiki edits

After singularity article says abbrev is BA. Dave's ext ref says it is AS. Which is it?
by Book
August 30th, 2022, 5:24 pm
Forum: Website Discussion
Topic: Suggested LifeWiki edits
Replies: 527
Views: 122191

Re: Suggested LifeWiki edits

HotWheels9232 wrote:
August 30th, 2022, 4:24 pm
Book wrote:
August 30th, 2022, 4:05 pm
HotWheels9232 wrote:
August 30th, 2022, 3:58 pm
The wiki says that the p18 pi hassler is p21, although it is in the p18 section.
fixed
Same for p100 for LoM hasslers
fixed
by Book
August 30th, 2022, 4:08 pm
Forum: Patterns
Topic: Still Lifes made of Isolated Polyominoes
Replies: 19
Views: 774

Re: Still Lifes made of Isolated Polyominoes

Wyirm wrote:
August 30th, 2022, 3:04 pm
is block not a polymino?
indeed it is a tetromino
by Book
August 30th, 2022, 4:05 pm
Forum: Website Discussion
Topic: Suggested LifeWiki edits
Replies: 527
Views: 122191

Re: Suggested LifeWiki edits

HotWheels9232 wrote:
August 30th, 2022, 3:58 pm
The wiki says that the p18 pi hassler is p21, although it is in the p18 section.
fixed
by Book
August 26th, 2022, 6:48 pm
Forum: General Discussion
Topic: Thread for PatMan (Pattern Manager)
Replies: 10
Views: 1414

Re: Thread for PatMan (Pattern Manager)

Patman needs RLEs in txt files. When I ported the new Golly Life collection, it occurred to me that others might need a simple way to change all the rle extensions in a folder and its subs to txt, so here's the Windows bat file I use: @ECHO OFF PUSHD . FOR /R %%d IN (.) DO ( cd "%%d" IF EXIST *.rle ...
by Book
August 26th, 2022, 4:27 pm
Forum: Patterns
Topic: Oscillator Discussion Thread
Replies: 3271
Views: 1106485

Re: Oscillator Discussion Thread

T-nosed P4s work
The T-nosed are the jackhammers of oscillators.
by Book
August 24th, 2022, 12:26 pm
Forum: General Discussion
Topic: Thread for basic questions
Replies: 3571
Views: 1040162

Re: Thread for basic questions

Nor is sublinear growth mentioned in the Book. Is there something useful to say about sublinear growth, something article worthy? Have a look at Section 8.8 in the book. There's no actual use of "sublinear" in the book, but there is one match on "sub-linear", and several pages after that explaining...
by Book
August 23rd, 2022, 7:10 pm
Forum: General Discussion
Topic: Thread for basic questions
Replies: 3571
Views: 1040162

Re: Thread for basic questions

We have wiki pages for superlinear growth and linear growth, but not for sublinear growth (this I noticed when I was looking at the infinite growth page). Nor is sublinear growth mentioned in the Book. Is there something useful to say about sublinear growth, something article worthy?
by Book
August 22nd, 2022, 6:19 pm
Forum: General Discussion
Topic: Thread for basic questions
Replies: 3571
Views: 1040162

Re: Thread for basic questions

Is there any real usages of cellar automata? My mom wants to write something to a magazine to like add some glory. Here's a list I shamelessly copied from techtarget.com: Real-world applications of CA Below are some of the most popular applications of CA. Epidemiology Cellular automata are used to ...
by Book
August 22nd, 2022, 4:06 pm
Forum: General Discussion
Topic: Thread for PatMan (Pattern Manager)
Replies: 10
Views: 1414

Re: Thread for PatMan (Pattern Manager)

The Golly Life collection on PatMan now contains the Golly 4.2 patterns.
by Book
August 22nd, 2022, 12:35 pm
Forum: General Discussion
Topic: Thread for basic questions
Replies: 3571
Views: 1040162

Re: Thread for basic questions

I'm looking for a good definition of stabilize/stabilization. The term is used all over the place, we all know what we mean by it, but I have not come across a well-thought-out definition. In my words: to stabilize a pattern P is to interact it with one or more patterns, stabilization/stabilizer S,...
by Book
August 20th, 2022, 8:26 pm
Forum: General Discussion
Topic: Thread for basic questions
Replies: 3571
Views: 1040162

Re: Thread for basic questions

hotdogPi wrote:
August 20th, 2022, 8:14 pm
Book wrote:
August 20th, 2022, 6:38 pm
Anyone have an rle for the boat cis-line tub induction coil?
This is the only thing it could be.

Code: Select all

x = 7, y = 4, rule = B3/S23
2b3o$bo3bo$obobobo$bo3b2o!
Thanks. How about boat cis-line hook?