Bi-block: Difference between revisions
https://conwaylife.com/forums/viewtopic.php?p=171203#p171203 I would say that a block array larger than 1x1 does *not* consist entirely of blocks. A rectangular patch of block agar is a single object (a pseudo still life). Further, Blockic mentions the concept of constructibility and links to several "further reading" sources also dealing with constructibility. Tag: Undo |
Haycat2009 (talk | contribs) m Since this is still under dispute, we will rely on the life wiki definition first. Tag: Undo |
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Revision as of 09:26, 7 December 2023
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| Pattern type | Pseudo still life | ||||||||
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| Number of cells | 8 | ||||||||
| Bounding box | 5 × 2 | ||||||||
| Static symmetry | Unspecified | ||||||||
| Discovered by | Unknown | ||||||||
| Year of discovery | 1970 | ||||||||
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The bi-block is a common formation of two blocks and the smallest and most common pseudo still life. Similar pseudo still lifes can be formed by considering any rectangular array of blocks, and are referred to as (m-by-n) block arrays.
Bi-blocks can be hassled by sparks to create oscillators, such as the p18 bi-block hassler and four molds hassling eight blocks. A bait bi-block is also used in a stable 8-lane glider shifter discovered in March 2023.
Commonness
The bi-block is about ¼ as common as the pond, the most common 8-bit strict still life. Compared to other strict still lifes, it is more common than the ship-tie but less common than the long boat.[1] In odd orthogonal symmetries, bi-blocks are more common, as gliders in the same phase that collide in odd symmetry form a bi-block.
Counting both strict and pseudo still lifes, the tri-block is the 9th most common 12-bit still life, and it would rank third behind the ship-tie and mirrored table but ahead of the block on cap if it were strict.
Gallery
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See also
References
External links
- Bi-block at the Life Lexicon
- Bi-block at Adam P. Goucher's Catagolue (pseudo-object)