Arun Debray wrote:I'm guessing someone already noticed this, but if you put a pre-pulsar on an 8 x 16 torus, it oscillates with period 20. So if I understand correctly, this can be made into an agar.
How does one go about stabilizing this to produce a p20 oscillator?
Interesting -- this seems maybe a little less impossible than usual, since you don't have to stabilize the sides, only the top and bottom. If you could find a p10 sparker that produced the white sparks every 10 ticks, that would do it:
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x = 13, y = 19, rule = LifeHistory
.C.C.C.C.C.C2$2.3A3.3A2$A4.A.A4.A$A4.A.A4.A$A4.A.A4.A2$2.3A3.3A2$2.3A
3.3A2$A4.A.A4.A$A4.A.A4.A$A4.A.A4.A2$2.3A3.3A2$.C.C.C.C.C.C!
Unfortunately a p4 or p5 sparker doesn't quite work -- not that it would be easy to find a sparker like that even at p4 or p5, and p10 isn't really within reach of current search utilities. We do have true-period p20 guns, so possibly there's a way to make useful sparks with carefully positioned sparking eaters or something. (I don't see how, but I'm wrong a lot about this kind of thing.)
Short summary: it seems hard to suppress the one key birth without an unreasonable lot of high-period sparks.
There aren't any successful stabilizations of this agar in the p20 section of Dean Hickerson's collection, jslife, or the jslife supplement. That doesn't necessarily mean it's new, it just means I can't immediately find any prior art (and at least it seems that no one has successfully stabilized it).
EDIT: Except they have, twice now! See following messages.
I'm not very good at oscillator stabilizations, so I probably shouldn't say anything... but maybe it would be safer to just be happy with the infinite agar:
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x = 141, y = 167, rule = B3/S23
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7b3o3b3o7b3o3b3o7b3o3b3o7b3o3b3o2$2b3o3b3o7b3o3b3o7b3o3b3o7b3o3b3o7b3o
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4bo3bo4bobo4bo3bo4bobo4bo3bo4bobo4bo3bo4bobo4bo3bo4bobo4bo2$2b3o3b3o7b
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3o3b3o7b3o3b3o7b3o3b3o2$o4bobo4bo3bo4bobo4bo3bo4bobo4bo3bo4bobo4bo3bo
4bobo4bo3bo4bobo4bo3bo4bobo4bo3bo4bobo4bo3bo4bobo4bo$o4bobo4bo3bo4bobo
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3b3o7b3o3b3o7b3o3b3o7b3o3b3o7b3o3b3o7b3o3b3o2$2b3o3b3o7b3o3b3o7b3o3b3o
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o4bobo4bo3bo4bobo4bo3bo4bobo4bo3bo4bobo4bo3bo4bobo4bo3bo4bobo4bo2$2b3o
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7b3o3b3o7b3o3b3o7b3o3b3o7b3o3b3o7b3o3b3o7b3o3b3o2$2b3o3b3o7b3o3b3o7b3o
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3o2$2b3o3b3o7b3o3b3o7b3o3b3o7b3o3b3o7b3o3b3o7b3o3b3o7b3o3b3o7b3o3b3o7b
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4bo3bo4bobo4bo3bo4bobo4bo3bo4bobo4bo$o4bobo4bo3bo4bobo4bo3bo4bobo4bo3b
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3bo4bobo4bo3bo4bobo4bo2$2b3o3b3o7b3o3b3o7b3o3b3o7b3o3b3o7b3o3b3o7b3o3b
3o7b3o3b3o7b3o3b3o7b3o3b3o2$2b3o3b3o7b3o3b3o7b3o3b3o7b3o3b3o7b3o3b3o7b
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4bo3bo4bobo4bo3bo4bobo4bo3bo4bobo4bo3bo4bobo4bo2$2b3o3b3o7b3o3b3o7b3o
3b3o7b3o3b3o7b3o3b3o7b3o3b3o7b3o3b3o7b3o3b3o7b3o3b3o2$2b3o3b3o7b3o3b3o
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o4bo3bo4bobo4bo$o4bobo4bo3bo4bobo4bo3bo4bobo4bo3bo4bobo4bo3bo4bobo4bo
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4bo2$2b3o3b3o7b3o3b3o7b3o3b3o7b3o3b3o7b3o3b3o7b3o3b3o7b3o3b3o7b3o3b3o
7b3o3b3o2$2b3o3b3o7b3o3b3o7b3o3b3o7b3o3b3o7b3o3b3o7b3o3b3o7b3o3b3o7b3o
3b3o7b3o3b3o2$o4bobo4bo3bo4bobo4bo3bo4bobo4bo3bo4bobo4bo3bo4bobo4bo3bo
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4bo3bo4bobo4bo3bo4bobo4bo3bo4bobo4bo3bo4bobo4bo3bo4bobo4bo3bo4bobo4bo$
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7b3o3b3o7b3o3b3o7b3o3b3o7b3o3b3o!
#C [[ THUMBNAIL THUMBSIZE 2 GPS 1 ZOOM 6 LOOP 60 AUTOSTART ]]