Schiaparelliorbust wrote: ↑December 26th, 2020, 11:17 am
How hard would it be to find a diagonally moving negative spaceship in the zebra stripes agar or one moving in a different agar?
Edit: To clarify, by the one in a different agar, I mean one that moves along the same symmetry of the agar itself, like orthogonal in a chicken wire agar or diagonal in the p14 herringbone agar:
This seems to be quite a tricky problem to solve. I've spent quite some time searching various agars at various speeds without much success. Pretty much the only thing I've found other than the known negative spaceships / bubbles / agar crawlers / signals in zebra stripes is a p4 lightspeed signal which I posted previously on the
Agar crawler thread:
Code: Select all
x = 32, y = 80, rule = B3/S23:T32,80
5b10o2b10o$5o10b2o10b5o$5b10o2b10o$5o10b2o10b5o$5b10o2b10o$5o10b2o10b
5o$5b10o2b10o$5o10b2o10b5o$5b10o2b10o$5o10b2o10b5o$5b10o2b10o$5o10b2o
10b5o$5b10o2b10o$5o10b2o10b5o$5b10o2b10o$5o10b2o10b5o$5b10o2b10o$5o10b
2o10b5o$5b10o2b10o$5o10b2o10b5o$5b10o2b10o$5o10b2o10b5o$5b10o2b10o$5o
10b2o10b5o$5b10o2b10o$5o10b2o10b5o$5b10o2b10o$5o10b2o10b5o$5b10o2b10o$
5o10b2o10b5o$5b10o2b10o$5o10b2o10b5o$5b10o2b10o$5o10b2o10b5o$5b10o2b
10o$5o10b2o10b5o$5b10o2b10o$5o10b2o10b5o$5b10o2b10o$5o10b2o10b5o$5b22o
$5o22b5o$5b10o3b9o$5o12bo9b5o$5b8o6b8o$5o22b5o$5b6o10b6o$5o22b5o$5b4o
14b4o$5o22b5o$5b3o16b3o$5o3bo14bo3b5o$5b4o14b4o$5o4bo12bo4b5o$5b3obo
12bob3o$5o4b2o10b2o4b5o$5bo5b10o5bo$5obobo3b3o2b3o3bobob5o$7bo5bo4bo5b
o$7ob2ob2o2bo3b2ob2ob7o$9bobo8bobo$8obob2o6b2obob8o$9bobob6obobo$7o2bo
2b2o4b2o2bo2b7o$7bobobobo4bobobobo$8obobo8bobob8o$7bobobo8bobobo$5o2bo
3bo8bo3bo2b5o$5bobo2b12o2bobo$5o2bo3b3o4b3o3bo2b5o$5b5o3bo4bo3b5o$5o6b
obo4bobo6b5o$5b7obo4bob7o$5o10b2o10b5o$5b10o2b10o$5o10b2o10b5o$5b10o2b
10o$5o10b2o10b5o$5b10o2b10o$5o10b2o10b5o!
I haven't actually tried anything diagonal on an agar, though I have found some c/3 diagonal signals on
variations of the
long barge wick.
dvgrn wrote: ↑December 28th, 2020, 9:25 am
Schiaparelliorbust wrote: ↑December 28th, 2020, 8:09 am
Macbi said that diagonal ship can't exist because it would case lightspeed decaying of the agar in the direction parallel to the zebra stripes, but what if the negative spaceship also moves at lightspeed?
There's no plausible mechanism for healing up a patch of chicken wire at lightspeed behind a negative spaceship.
The closest thing to that is the magically reappearing beehives in Jason Summers' telegraph, but that's not exactly chicken wire, and wouldn't work with agar packed tightly all around it.
Again, I'm no expert on this, so I haven't personally tried running the relevant search at various widths and gotten an official UNSATISFIABLE or "0 solutions" result.
Here's a very short partial backend for p4 lightspeed signal across the chickenwire agar:
Code: Select all
x = 44, y = 23, rule = B3/S23
b2o6b2o6b2o6b2o6b2o6b2o$o2bo4bo2bo4bo2bo4bo2bo4bo2bo4bo2bo$b2o2b2o2b2o
2b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o$3b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o
2b2o$b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o$o2b2o2b2o2b2o2b2o2b2o
2b2o2b2o2b2o2b2o2b2o2bo$b2o2b2o2b2o2b2o3bo2b2o2bo3b2o2b2o2b2o2b2o$3b2o
2b2o2b2o2b3o2bo2bo2b3o2b2o2b2o2b2o$b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o
2b2o2b2o$o2b2o2b2o2b2o2bo3b2o2b2o3bo2b2o2b2o2b2o2bo$b2o2b2o2b2o2b2o2b
2o2b2o2b2o2b2o2b2o2b2o2b2o$3b2o2b2o2b2o2b3o2bo2bo2b3o2b2o2b2o2b2o$b2o
2b2o2b2o2b2o4b2o2b2o4b2o2b2o2b2o2b2o$o2b2o2b2o2b2o2b4o6b4o2b2o2b2o2b2o
2bo$b2o2b2o2b2o2b2obo3bo2bo3bob2o2b2o2b2o2b2o$3b2o2b2o2bo5bo8bo5bo2b2o
2b2o$b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o$o2b2o2b2o26b2o2b2o2bo
$b2o2b2o2b2o22b2o2b2o2b2o$3b2o2b2o26b2o2b2o$b2o2b2o2bo24bo2b2o2b2o$o2b
2o2b2o26b2o2b2o2bo$b2o2b2o30b2o2b2o!
That's not saying much, but I'm pretty confident p4 lightspeed is possible. Here's a list of speeds which, as far as I can see, are at least plausible in this agar (relative to the orientation in the rle above):
(0,2)c/4, (0,2)c/5, (0,2)c/6, (4,0)c/4, (4,0)c/5, (4,0)c/6, (2,1)c/4, (2,1)c/5, (2,1)c/6
I'm fairly sure we can rule out (0,2)c/2, (0,2)c/3, (0,4)c/6, and (2,1)c/3