Pi orbital: Difference between revisions

	Pi orbital
	<span class="mw-default-size" typeof="mw:File"><a href="/wiki/File:Piorbital.png" class="mw-file-description" title="Pi orbital image"><img alt="Pi orbital image" src="/w/images/b/b7/Piorbital.png" decoding="async" width="134" height="134" class="mw-file-element"></a></span>
	<span class="mw-default-size" typeof="mw:File"><a href="/wiki/File:Piorbital.png" class="mw-file-description" title="Pi orbital image"><img alt="Pi orbital image" src="/w/images/b/b7/Piorbital.png" decoding="async" width="134" height="134" class="mw-file-element"></a></span>
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Pattern type	Oscillator
Number of cells	305
Bounding box	59 × 59
Period	168 (mod: Unknown)
Heat	270.7
Volatility	0.91 \| Unknown
Kinetic symmetry	Unspecified
Discovered by	Noam Elkies
Year of discovery	1995
Pattern files
Plaintext	piorbital.cells
RLE	piorbital.rle

Revision as of 02:47, 12 April 2015

Pi orbital is a period 168 oscillator that was found by Noam Elkies in August 1995. It works by using four crowns and four blocks to turn a pi heptomino ninety degrees every 42 generations. A second pi heptomino can be inserted to reduce the period to 84. On March 26, 2009 Nicolay Beluchenko found a relatively small period 12 sparker that could replace the crowns. On April 6, 2010 Matthias Merzenich discovered the Blocked p4-4 period 4 oscillator that also supports the oscillator.

@@ Line 6: / Line 6: @@
 {|
 |-
-|[[Image:piorbit_gen27.png|framed|left|Generation 27 reveals the pi heptomino]]
 |[[Image:piorbital_alt.png|framed|left|An alternate version of pi orbital using Nicolay Beluchenko's period 12 oscillator<br/>{{JavaRLE|alternatepiorbital|brief}}]]
-|[[Image:P168.PNG‎|framed|left|form by Matthias Merzenich]]
+|[[Image:P168.PNG‎|framed|left|Alternate form by Matthias Merzenich]]
 |}