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Fano database
Posted: March 4th, 2019, 1:55 am
by 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!
Re: Fano database
Posted: March 4th, 2019, 6:58 am
by 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 (?).
Re: Fano database
Posted: March 6th, 2019, 1:42 am
by Hdjensofjfnen
77topaz wrote: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.
Re: Fano database
Posted: March 6th, 2019, 3:57 am
by 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:
gliders.db wrote:# 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.
Re: Fano database
Posted: March 6th, 2019, 9:12 am
by Moosey
Would it be possible to add nontotalistic rules to the database?
I guess that would be far too much.
Re: Fano database
Posted: March 6th, 2019, 12:08 pm
by AforAmpere
Moosey wrote: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.