Bi-block: Difference between revisions
Undo revision 142245 by Haycat2009 (talk) Blockic constellations appear in contexts where constructibility matters. Constructing pseudo still lives wih a slow salvo is significantly harder than constructing well-separated parts of those still lives Tag: Undo |
Haycat2009 (talk | contribs) m By the Lifewiki defination of blockic, this is blockic as it is a constellation consisting entirely of blocks. Constuctability does not matter in the lifewiki defination. Tag: Undo |
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Revision as of 05:17, 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)