Fumarole: Difference between revisions

	Fumarole
	<span class="mw-default-size" typeof="mw:File"><a href="/wiki/File:Fumarole.png" class="mw-file-description" title="Fumarole image"><img alt="Fumarole image" src="/w/images/2/23/Fumarole.png" decoding="async" width="162" height="146" class="mw-file-element"></a></span>
	<span class="mw-default-size" typeof="mw:File"><a href="/wiki/File:Fumarole.png" class="mw-file-description" title="Fumarole image"><img alt="Fumarole image" src="/w/images/2/23/Fumarole.png" decoding="async" width="162" height="146" class="mw-file-element"></a></span>
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Pattern type	Oscillator
Number of cells	18
Bounding box	8 × 7
Period	5 (mod: Unknown)
Heat	12.8
Volatility	0.72 \| 0.72
Kinetic symmetry	Unspecified
Discovered by	Dean Hickerson
Year of discovery	1989
Glider synthesis
Fewest gliders	7
Uploaded synthesis RLE	fumarole_synth.rle
Pattern files
Plaintext	fumarole.cells
RLE	fumarole.rle

Revision as of 15:36, 11 July 2011

Fumarole is a period 5 oscillator that was found by Dean Hickerson in September 1989. In terms of its 18 cells it is the fourth smallest period 5 oscillator, after pseudo-barberpole, octagon 2, and Silver's p5; however, its 7×8 bounding box is the smallest of any known period 5 oscillator. The domino spark that it provides makes it useful in the construction of higher period oscillators such as the p35 beehive hassler, p40 B-heptomino shuttle, and 98P25. On September 1, 1995, Noam Elkies found a way to non-trivially combine two fumaroles and a blinker into a period 10 oscillator, shown below.^[1] In February 2000 Stephen Silver found a 7-glider synthesis of this oscillator.^[2]

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+[[Category:Patterns with bilateral symmetry]]