A for all

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A for all
4b2o4b$3bo2bo3b$3b4o3b$bobo2bobob$o8bo$o8bo$bobo2bobob$3b4o3b$3bo2bo3b $4b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ WIDTH 600 HEIGHT 600 THUMBSIZE 3 ZOOM 42 GPS 2 LOOP 6 ]]
Pattern type Oscillator
Number of cells 28
Bounding box 10 × 10
Period 6
Mod 3
Heat 13.3
Volatility 0.73
Strict volatility 0.73
Discovered by Dean Hickerson
Year of discovery 1993
Not to be confused with Big A.

A for all is a period-6 oscillator found by Dean Hickerson on March 6, 1993.[1] Its claimed 13-glider synthesis was found by David Buckingham in 1993, but was forgotten about and not revealed until August 1995. This synthesis was later found to be invalid due to gliders crossing paths and replaced with a similar 12-glider synthesis which avoids this issue.[2]

About one in 289,000 soups in the correct symmetry (D4_+4) form an A for all.

Similar block-hassling oscillators

These are oscillators that perturb a block on their edge by two diagonally-adjacent cells throughout a full phase, that eventually returns to a block through the outward-facing grin predecessor.

x = 12, y = 21, rule = B3/S23 5b2o$4bo2bo$4b4o$2b3o2b3o$bo8bo$3o6b3o$b2o6b2o$2bo6bo$b2o6b2o$bo8bo$2o8b2o$bo8bo$b2o6b2o$2bo6bo$b2o6b2o$3o6b3o$bo8bo$2b3o2b3o$4b4o$4bo2bo$5b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ WIDTH 560 HEIGHT 600 THUMBSIZE 3 ZOOM 21 GPS 3/1 AUTOSTART ]]
unnamed p3
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Catagoluehere
x = 24, y = 24, rule = B3/S23 11b2o$11b2o$10bo2bo$7bo3b2o3bo$7bobo4bobo$6bobob4obobo$5bo2bobo2bobo2b o$3b2o3b2o4b2o3b2o$5b3o8b3o$4bo2bo8bo2bo$2bo2b2o10b2o2bo$2obobo12bobob 2o$2obobo12bobob2o$2bo2b2o10b2o2bo$4bo2bo8bo2bo$5b3o8b3o$3b2o3b2o4b2o 3b2o$5bo2bobo2bobo2bo$6bobob4obobo$7bobo4bobo$7bo3b2o3bo$10bo2bo$11b2o $11b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ WIDTH 600 HEIGHT 600 THUMBSIZE 3 ZOOM 21 GPS 7/2 AUTOSTART ]]
O for ball,[n 1] p7
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Catagoluehere
x = 18, y = 19, rule = B3/S23 8b2o$7bo2bo$8b2o$7bo2bo$4bob2o2b2obo$3bo2b2o2b2o2bo$b3o2bo4bo2b3o$o5b 2o2b2o5bo$8o2b8o2$8o2b8o$o5b2o2b2o5bo$b3o2bo4bo2b3o$3bo2b2o2b2o2bo$4bo b2o2b2obo$7bo2bo$8b2o$7bo2bo$8b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ WIDTH 600 HEIGHT 600 THUMBSIZE 3 ZOOM 21 GPS 4 AUTOSTART ]]
unnamed p8[n 2]
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Catagoluehere


See also

Notes

  1. Named by an anonymous Catagolue commenter on April 18, 2019.
  2. has a population-optimised version; Catagoluehere

References

  1. Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.
  2. Jeremy Tan (April 18, 2019). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums

External links