Trans-boat amphisbaena
| Trans-boat amphisbaena | |||||||||
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| Pattern type | Strict still life | ||||||||
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| Number of cells | 12 | ||||||||
| Bounding box | 7 × 6 | ||||||||
| Frequency class | 29.3 | ||||||||
| Discovered by | Robert Wainwright Everett Boyer | ||||||||
| Year of discovery | 1973 | ||||||||
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Trans-boat amphisbaena[1] or trans-boat trans-line hook is a 12-cell still life.
Construction
This still life is known to be constructible with 5 gliders.[1] Several alternate syntheses can be found in Mark Niemiec's database.[2]
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Occurrence
Among the 121 still lifes with 12 cells, this is the 57th most common still life according to Catagolue.
There are no occurrences of this still life in final patterns of collisions in octohash, octo3obj or octo3g databases.
Isomers
This still life is comprised of a normally stable boat and a normally unstable hook connected by a three-cell-long line. This is one of two possible isomers, named trans due to the corner part of the boat facing outwards from the line; the other isomer, cis-boat trans-line hook, has this corner part tucked inwards.
The closely related pattern "boat cis-line hook" is an induction coil, in much the same way as the integral is a still life whereas the house is an induction coil. Note that there is only one valid isomer for the cis-line arrangement, analogous to cis-boat trans-line hook, as the trans- arrangement would cause unwanted birth between the boat and hook.
| Boat cis-line hook induction coil (click above to open LifeViewer) RLE: here Plaintext: here |
See also
References
- ↑ 1.0 1.1 1.2 xs12_g88a53z23 at Adam P. Goucher's Catagolue
- ↑ 2.0 2.1 The 121 twelve-bit still-lifes at Mark D. Niemiec's Life Page (download pattern file: 12/12-69.rle)
External links
- Trans-boat amphisbaena at Adam P. Goucher's Catagolue
- 12.47 at Heinrich Koenig's Game of Life Object Catalogs
- Patterns
- Patterns with Catagolue frequency class 29
- Natural periodic objects
- Periodic objects with minimum population 12
- Patterns with 12 cells
- Patterns found by Robert Wainwright
- Patterns found by Everett Boyer
- Patterns found in 1973
- Patterns that can be constructed with 5 gliders
- Still lifes
- Strict still lifes
- Strict still lifes with 12 cells