## Thread for basic non-CGOL questions

For discussion of other cellular automata.
muzik
Posts: 3775
Joined: January 28th, 2016, 2:47 pm
Location: Scotland

### Re: Thread for basic non-CGOL questions

Hunting wrote:
February 16th, 2020, 10:45 am
muzik wrote:
February 15th, 2020, 6:40 pm
Are b1357s1357, b1357s02468, b02468s1357 and b02468s02468 reversible? I've heard on multiple occasions that they are but given the way large patterns tend to immediately die out at generations 2^n it doesn't seem at all possible for an outer-totalistic rule to generate these patterns from a void.
Because there is B1, there's no pattern that can die out.
Yes, obviously, but are the rules reversible?
Bored of using the Moore neighbourhood for everything? Introducing the Range-2 von Neumann isotropic non-totalistic rulespace!

Moosey
Posts: 3160
Joined: January 27th, 2019, 5:54 pm
Location: A house, or perhaps the OCA board. Or [click to not expand]
Contact:

### Re: Thread for basic non-CGOL questions

muzik wrote:
February 16th, 2020, 10:57 am
Hunting wrote:
February 16th, 2020, 10:45 am
muzik wrote:
February 15th, 2020, 6:40 pm
Are b1357s1357, b1357s02468, b02468s1357 and b02468s02468 reversible? I've heard on multiple occasions that they are but given the way large patterns tend to immediately die out at generations 2^n it doesn't seem at all possible for an outer-totalistic rule to generate these patterns from a void.
Because there is B1, there's no pattern that can die out.
Yes, obviously, but are the rules reversible?
Yes- there is an algorithm which can generate those patterns from a void surrounded by the replicated patterns
I am a prolific creator of many rather pathetic googological functions

My CA rules can be found here

Also, the tree game
Bill Watterson once wrote: "How do soldiers killing each other solve the world's problems?"

``````x = 20 , y = 3 , rule=B2/S