Space nonfiller
A space nonfiller is any pattern that expands indefinitely to affect all but finitely many cells in the Life plane, but leaves an expanding region of vacuum at its center. The first nonfiller was discovered by Jason Summers on April 14, 1999:
| <html><div class="rle"><div class="codebox"><div style="display:none;"><code></html>x = 37, y = 31, rule = B3/S23
19b3o$18bo2bo$12b3o6bo4b3o$12bo2bobo3bo4bo2bo$12bo2bobo3bo4bo2bo$10bo
10bo2bobob3o$10b2o2b2o2bobo4bo5bo$8bo16b2o2b3o$8b3obob2o10bo6bo$6bo8bo
9bobo3b3o$6b3o5bo10bo8bo$3bobo25bob3o$2b5obo26bo$b2o6bo21b5o$2o4b2o18b
obo$bobo3bo2bo15bo2bo3bobo$8bobo18b2o4b2o$b5o21bo6b2o$bo26bob5o$b3obo
25bobo$2bo8bo10bo5b3o$3b3o3bobo9bo8bo$3bo6bo10b2obob3o$5b3o2b2o16bo$5b
o5bo4bobo2b2o2b2o$6b3obobo2bo10bo$7bo2bo4bo3bobo2bo$7bo2bo4bo3bobo2bo$
8b3o4bo6b3o$15bo2bo$15b3o!
#C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]]
#C [[ THUMBNAIL THUMBSIZE 2 THEME 6 HEIGHT 640 WIDTH 640 ZOOM 16 GRID ]]<html></code></div></div><canvas width="200" height="300" style="margin-left:1px;"><noscript></html> Please enable Javascript to view this LifeViewer. <html></noscript></canvas></div></html> |
| (click above to open LifeViewer) RLE: here Plaintext: here |
By placing a die hard inside the empty space, a pattern can be constructed with the property that every cell in the universe is alive at some point in the pattern's evolution but eventually turns dead permanently.[1]
Also see
gollark: This is ultrahyperfast***.
gollark: ```ruststruct Fib1 { cache: Vec<u128>}impl Iterator for Fib1 { type Item = u128; fn next(&mut self) -> Option<Self::Item> { let n = self.cache.len(); let next = self.cache[n - 1] + self.cache[n - 2]; self.cache.push(next); Some(next) }}fn fib1() -> Fib1 { Fib1 { cache: vec![0, 1] } }fn main() { for n in fib1() { print!("{} ", n); }}```
gollark: Okay.
gollark: Working on it.
gollark: But I could do that and it would be less slow.
References
- Adam P. Goucher (August 5, 2020). Pure nonfillers (discussion thread) at the ConwayLife.com forums
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