Block: Difference between revisions
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{{Stilllife|name=Block|pname=block|c=4|bx=2|by=2|discoveryear=1970|discoverer=John Conway|life105=true|life106=true|plaintext=true|rle=true|synthesis=2|synthesisRLE=true}} | {{Stilllife|name=Block|pname=block|c=4|bx=2|by=2|discoveryear=1970|discoverer=John Conway|life105=true|life106=true|plaintext=true|rle=true|synthesis=2|synthesisRLE=true}} | ||
'''Block''' is an extremely well-known and common [[still life]] that was found by [[:Category:Patterns found by John Conway|John Conway]] in [[:Category:Patterns found in 1970|1970]]. In terms of its [[:Category:Strict still lifes with 4 cells|4]] [[cell]]s it is tied with [[tub]] as the smallest still life, and in terms of its 2×2 [[bounding box]] it is the outright the smallest. It is also the most common still life, occurring almost twice as often as [[beehive]], the next most common still life.<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> | '''Block''' is an extremely well-known and common [[still life]] that was found by [[:Category:Patterns found by John Conway|John Conway]] in [[:Category:Patterns found in 1970|1970]]. In terms of its [[:Category:Strict still lifes with 4 cells|4]] [[cell]]s it is tied with [[tub]] as the smallest still life, and in terms of its 2×2 [[bounding box]] it is the outright the smallest. | ||
Due to its small size, its ability to act as an [[eater]], and its simple [[glider synthesis|glider syntheses]], it is extremely useful in the construction of large patterns. It can be used as an [[induction coil]] as in [[block and dock]], [[block on table]] and [[griddle and block]]. | |||
It is also the most common still life that occurs as a result of [[soup|random starting patterns]], occurring almost twice as often as [[beehive]], the next most common still life.<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> | |||
The block was one of the patterns described in the original 1970 article by Martin Gardner that introduced the [[Conway's Game of Life|Game of Life]] to the world. | The block was one of the patterns described in the original 1970 article by Martin Gardner that introduced the [[Conway's Game of Life|Game of Life]] to the world. | ||
==See also== | ==See also== | ||
*[[Bi-block]] | |||
*[[Blockade]] | *[[Blockade]] | ||
*[[Grin]] | |||
*[[List of common still lifes]] | *[[List of common still lifes]] | ||
*[[Pre-block]] | *[[Pre-block]] | ||
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==External links== | ==External links== | ||
*[http://www.ericweisstein.com/encyclopedias/life/Block.html Block] at Eric Weisstein's Treasure Trove of Life | |||
*[http://www.argentum.freeserve.co.uk/lex_b.htm#block Block] at the Life Lexicon | *[http://www.argentum.freeserve.co.uk/lex_b.htm#block Block] at the Life Lexicon | ||
*[http://home.interserv.com/~mniemiec/still.htm#4-bit%20still Four-bit still lifes] by Mark Niemiec | |||
*[http://www.ibiblio.org/lifepatterns/october1970.html The fantastic combinations of John Conway's new solitaire game "life"] by Martin Gardner | *[http://www.ibiblio.org/lifepatterns/october1970.html The fantastic combinations of John Conway's new solitaire game "life"] by Martin Gardner | ||
Revision as of 13:37, 23 April 2009
| Block | |||||||
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| Pattern type | Strict still life | ||||||
|---|---|---|---|---|---|---|---|
| Number of cells | 4 | ||||||
| Bounding box | 2 × 2 | ||||||
| Static symmetry | Unspecified | ||||||
| Discovered by | John Conway | ||||||
| Year of discovery | 1970 | ||||||
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Block is an extremely well-known and common still life that was found by John Conway in 1970. In terms of its 4 cells it is tied with tub as the smallest still life, and in terms of its 2×2 bounding box it is the outright the smallest.
Due to its small size, its ability to act as an eater, and its simple glider syntheses, it is extremely useful in the construction of large patterns. It can be used as an induction coil as in block and dock, block on table and griddle and block.
It is also the most common still life that occurs as a result of random starting patterns, occurring almost twice as often as beehive, the next most common still life.[1]
The block was one of the patterns described in the original 1970 article by Martin Gardner that introduced the Game of Life to the world.
See also
References
- ↑ Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on January 15, 2009.
External links
- Block at Eric Weisstein's Treasure Trove of Life
- Block at the Life Lexicon
- Four-bit still lifes by Mark Niemiec
- The fantastic combinations of John Conway's new solitaire game "life" by Martin Gardner