Difference between revisions of "Fore and back"

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("S2" is not a symmetry)
(glider synthesis)
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{{Oscillator|p=2|c=24|h=4|v=0.15|bx=7|by=7|name=Fore and back|pname=foreandback|discoveryear=1994|discoverer=Achim Flammenkamp|life105=true|life106=true|plaintext=true|rle=true|animated=true|v=0.15}}
{{Oscillator|p=2|c=24|h=4|v=0.15|bx=7|by=7|name=Fore and back|pname=foreandback|discoveryear=1994|discoverer=Achim Flammenkamp|life105=true|life106=true|plaintext=true|rle=true|animated=true|v=0.15}}
'''Fore and back''' (or '''complementary blinker''') is a [[period]] [[:Category:Oscillators with period 2|2]] [[oscillator]] that was found by [[:Category:Patterns found by Achim Flammenkamp|Achim Flammenkamp]] in July [[:Category:Patterns found in 1994|1994]]. It is about the 38th most common naturally-occurring oscillator, being less common than [[boat on spark coil]] and [[griddle and block]], about as common as [[21P2]], and more common than [[trans-block and long hook eating tub]] and [[beacon and long hook|trans-beacon down and long hook]].<ref>{{cite web|url=http://wwwhomes.uni-bielefeld.de/achim/freq_top_life.html |title=Most seen natural occurring ash objects in Game of Life |author=Achim Flammenkamp |date=September 7, 2004 |accessdate=January 15, 2009}}</ref>
'''Fore and back''' (or '''complementary blinker''') is a [[period]] [[:Category:Oscillators with period 2|2]] [[oscillator]] that was found by [[:Category:Patterns found by Achim Flammenkamp|Achim Flammenkamp]] in July [[:Category:Patterns found in 1994|1994]]. It is about the 38th most common naturally-occurring oscillator, being less common than [[boat on spark coil]] and [[griddle and block]], about as common as [[21P2]], and more common than [[trans-block and long hook eating tub]] and [[beacon and long hook|trans-beacon down and long hook]].<ref>{{cite web|url=http://wwwhomes.uni-bielefeld.de/achim/freq_top_life.html |title=Most seen natural occurring ash objects in Game of Life |author=Achim Flammenkamp |date=September 7, 2004 |accessdate=January 15, 2009}}</ref>
In August, 2013 a 24-glider synthesis of this oscillator was found by Martin Grant, based on a soup, provided by Lewis Patterson. Several days later Mark Niemiec improved this result, having found a 20-glider synthesis.<ref>{{cite web|url=http://www.conwaylife.com/forums/viewtopic.php?p=8688#p8688|title=Synthesising Oscillators|date=|accessdate=September 10, 2013}}</ref>


==See also==
==See also==

Revision as of 19:34, 10 September 2013

Fore and back
2ob2o2b$2obobob$6bo$3ob3o$o6b$bobob2o$2b2ob2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]]
Pattern type Oscillator
Number of cells 24
Bounding box 7 × 7
Period 2
Mod Unknown
Heat 4
Volatility 0.15
Strict volatility 0.15
Discovered by Achim Flammenkamp
Year of discovery 1994

Fore and back (or complementary blinker) is a period 2 oscillator that was found by Achim Flammenkamp in July 1994. It is about the 38th most common naturally-occurring oscillator, being less common than boat on spark coil and griddle and block, about as common as 21P2, and more common than trans-block and long hook eating tub and trans-beacon down and long hook.[1]

In August, 2013 a 24-glider synthesis of this oscillator was found by Martin Grant, based on a soup, provided by Lewis Patterson. Several days later Mark Niemiec improved this result, having found a 20-glider synthesis.[2]

See also

References

  1. Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on January 15, 2009.
  2. "Synthesising Oscillators". Retrieved on September 10, 2013.

External links