Difference between revisions of "Pentoad"

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|apgcode          = xp5_y4ca23zwgg3226z6221
 
|apgcode          = xp5_y4ca23zwgg3226z6221
 
|pentadecathlonid = 20P5.9
 
|pentadecathlonid = 20P5.9
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|viewerconfig    = #C [[ GPS 2 ZOOM 16 LOOP 5 ]]
 
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'''Pentoad''' (or '''eater-bound Z-hexomino'''<ref>{{cite web|url=http://codercontest.com/mniemiec/20et2z.rle|title=Eater-bound Z-hexomino glider synthesis RLE file|author=Mark D. Niemiec|accessdate=April 28, 2009}}</ref>) is a [[period]] [[:Category:Oscillators with period 5|5]] [[oscillator]] that was found by [[:Category:Patterns found by Bill Gosper|Bill Gosper]] in June [[:Category:Patterns found in 1977|1977]]. It consists of a [[Z-hexomino]] that is stabilized by two [[eater 1]]s.
 
'''Pentoad''' (or '''eater-bound Z-hexomino'''<ref>{{cite web|url=http://codercontest.com/mniemiec/20et2z.rle|title=Eater-bound Z-hexomino glider synthesis RLE file|author=Mark D. Niemiec|accessdate=April 28, 2009}}</ref>) is a [[period]] [[:Category:Oscillators with period 5|5]] [[oscillator]] that was found by [[:Category:Patterns found by Bill Gosper|Bill Gosper]] in June [[:Category:Patterns found in 1977|1977]]. It consists of a [[Z-hexomino]] that is stabilized by two [[eater 1]]s.

Latest revision as of 19:03, 7 July 2019

Pentoad
x = 13, y = 12, rule = B3/S23 11b2o$11bo$9bobo$9b2o$5b2o$6bo$6bo$6b2o$2b2o$bobo$bo$2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ GPS 2 ZOOM 16 LOOP 5 ]]
Pattern type Oscillator
Number of cells 20
Bounding box 13×12
Period 5
Mod 5
Heat 8.8
Volatility 0.65
Strict volatility 0.65
Discovered by Bill Gosper
Year of discovery 1977

Pentoad (or eater-bound Z-hexomino[1]) is a period 5 oscillator that was found by Bill Gosper in June 1977. It consists of a Z-hexomino that is stabilized by two eater 1s.

It was discovered by Scott Kim that this oscillator is extensible by moving one of the eaters diagonally away by four cells and inserting another Z-hexomino in the gap. A pentoad constructed in this way with n Z-hexominoes has 14 + 6n cells and heat 8.8 + 6.4n. The pentoad with two Z-hexominoes is shown below.

Image gallery

The pentoad with two Z-hexominoes.
Download RLE: click here

See also

References

  1. Mark D. Niemiec. "Eater-bound Z-hexomino glider synthesis RLE file". Retrieved on April 28, 2009.

External links

  • 20P5.9 at Heinrich Koenig's Game of Life Object Catalogs