Fano database

[Hdjensofjfnen]

The Fano database of gliders is in desperate need of updating. There is this 13-cell c/3o, the "cicada", in B3/S01367, that isn't in it.

Code: Select all

x = 7, y = 9, rule = B3/S01367
3bo$3bo$bo$bo2b3o2$3o2$b2o$2bo!

[77topaz]

That's far from the only example. The B3/S23 page, for example, doesn't list the loafer or the copperhead. The Fano site hasn't been updated in at least several years, and I think the creator David Eppstein either isn't working with CA anymore or hasn't been contactable by anyone (?).

[Hdjensofjfnen]

I think the creator David Eppstein either isn't working with CA anymore or hasn't been contactable by anyone (?).

I can contact him via Wikipedia.

[wildmyron]

Or you could contact him directly: https://www.ics.uci.edu/~eppstein/contact.html

Apparently he still thinks about CA now and then, e.g. https://11011110.github.io/blog/2018/12 ... ntual.html

As far as the glider database goes I don't think that's been updated in quite some time. There are two relevant threads on this board if you are interested in known results:
http://conwaylife.com/forums/viewtopic.php?f=11&t=1787
http://conwaylife.com/forums/viewtopic.php?f=11&t=1074

For the specific rule you mentioned there is already a c/3 known in that rule. Please note comments from the glider db:

# There are far too many gliders known even just in life to just list
# them all (in fact, there are usually infinitely many types of gliders
# whenever there is any). The primary reason for including a glider in
# this list is to cover every known combination of speed and rules.
# Secondarily, I am also including particularly small gliders, or
# gliders that work unchanged in many different rules.

[Moosey]

Would it be possible to add nontotalistic rules to the database?
I guess that would be far too much.

[AforAmpere]

Would it be possible to add nontotalistic rules to the database?
I guess that would be far too much.

I had been working on a user-editable NT glider database, but nobody wanted to add to it. The discussion is here.