BTS: Difference between revisions
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updated synthesis |
after discussion, moving all the "B" strict still life pages back to Hickerson format, in preparation for displaying both Hickerson and Catagolue symmetry format on the infobox "symmetry" line for still lifes -- see https://conwaylife.com/forums/viewtopic.php?p=201720#p201720 |
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| Line 5: | Line 5: | ||
|bx = 7 | |bx = 7 | ||
|by = 8 | |by = 8 | ||
|symmetry = n | |||
|discoverer = Mark Niemiec | |discoverer = Mark Niemiec | ||
|rulemin = B/S23 | |rulemin = B/S23 | ||
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|isorulemin = B/S2aek3nr | |isorulemin = B/S2aek3nr | ||
|isorulemax = B2in34-ainry5-jqr678/S012345678 | |isorulemax = B2in34-ainry5-jqr678/S012345678 | ||
|synthesis = | |synthesis = 7 | ||
|plaintext = true | |plaintext = true | ||
|rle = true | |rle = true | ||
|apgcode = xs19_32qb079czw23 | |apgcode = xs19_32qb079czw23 | ||
|pentadecathlonid = 19.28858 | |pentadecathlonid = 19.28858 | ||
}}{{stub|This article can be expanded with: comparison and contrast with {{LinkCatagolue|xs18_8e13z315b8o|style=raw}} (used in places like [[p21 honey farm hassler]]) in catalysis.}} | |||
'''BTS''', short for '''bookend-table-snake''', is a {{slcells|19|text=19-cell}} [[still life]] where a [[bookend]] is stabilized by a [[down snake on table]]. It is notable for having multiple uses as a [[catalyst]] in larger patterns. | |||
The BTS was first officially enumerated among other still lives by [[Mark Niemiec]], but it was not until 2015 that [[Tanner Jacobi]] noticed (and somewhat popularized) its usefulness, due to its extensive appearances in results generated by [[Mike Playle]]'s [[Bellman]] program.<ref name="post18079" /> Example uses of this object as a catalyst for non-[[Spartan]] [[signal]] [[circuitry]] include the [[CC semi-cenark]], [[Jormungant's G-to-H]] and a glider-emitting [[F131]] variant. | |||
A typical [[catalysis]] of a BTS or related still life involves the flat end of the bookend and one or both feet of the table. | |||
{{EmbedViewer | |||
|pname = eaterbts | |||
|viewerconfig = #C [[ GPS 2 THUMBSIZE 2 STOP 3 ]] | |||
|position = center | |||
|caption = BTS as [[eater 1]] replacement when eating a [[B-heptaplet]] parent. For more examples see [[Tutorials/Catalyses#Fishhook_replacements]] | |||
|style = width:300px; | |||
}} | }} | ||
== Commonness == | |||
{{main|List of common still lifes}} | |||
{{Needs occurrence info|type=still life}} | |||
== Glider synthesis == | |||
On December 13, {{year|2020}}, [[MathAndCode]] found a {{gliders|10}} [[synthesis]] of this still life.<ref name="post115747" /> | On December 13, {{year|2020}}, [[MathAndCode]] found a {{gliders|10}} [[synthesis]] of this still life.<ref name="post115747" /> | ||
==References== | == References == | ||
<references> | <references> | ||
<ref name="post18079">{{LinkForumThread | <ref name="post18079">{{LinkForumThread | ||
| Line 42: | Line 58: | ||
== External links == | == External links == | ||
{{LinkLexicon|lex_b.htm#bts}} | * {{LinkLexicon|lex_b.htm#bts}} | ||
{{LinkCatagolue|xs19_32qb079czw23}} | * {{LinkCatagolue|xs19_32qb079czw23}} | ||
{{LinkNiemiec|bits-19.htm|patternname=Nineteen-Bit Life Objects}} | <!-- * {{LinkNiemiec|bits-19.htm|patternname=Nineteen-Bit Life Objects}} (Note: list does not appear to contain this still life, and searching finds no matching pattern in database. The site was last updated in 2015, and BTS might be included in the future.) --> | ||
__NOTOC__ | |||
{{natural}} | |||
[[Category:Catalysts]] | |||
Latest revision as of 05:00, 16 January 2025
| BTS | |||||||||
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| Pattern type | Strict still life | ||||||||
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| Number of cells | 19 | ||||||||
| Bounding box | 7 × 8 | ||||||||
| Static symmetry | n (C1) | ||||||||
| Discovered by | Mark Niemiec | ||||||||
| Year of discovery | Unknown | ||||||||
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This article is a stub. You can help LifeWiki by expanding it. This article can be expanded with: comparison and contrast with xs18_8e13z315b8o (used in places like p21 honey farm hassler) in catalysis. |
BTS, short for bookend-table-snake, is a 19-cell still life where a bookend is stabilized by a down snake on table. It is notable for having multiple uses as a catalyst in larger patterns.
The BTS was first officially enumerated among other still lives by Mark Niemiec, but it was not until 2015 that Tanner Jacobi noticed (and somewhat popularized) its usefulness, due to its extensive appearances in results generated by Mike Playle's Bellman program.[1] Example uses of this object as a catalyst for non-Spartan signal circuitry include the CC semi-cenark, Jormungant's G-to-H and a glider-emitting F131 variant.
A typical catalysis of a BTS or related still life involves the flat end of the bookend and one or both feet of the table.
| BTS as eater 1 replacement when eating a B-heptaplet parent. For more examples see Tutorials/Catalyses#Fishhook_replacements (click above to open LifeViewer) RLE: here Plaintext: here |
Commonness
- Main article: List of common still lifes
Information on this still life's commonness with respect to other naturally-occurring patterns is currently unknown.
Glider synthesis
On December 13, 2020, MathAndCode found a 10-glider synthesis of this still life.[2]
References
- ↑ Tanner Jacobi (March 19, 2015). Re: Catalyst improvements WIP (discussion thread) at the ConwayLife.com forums
- ↑ MathAndCode (December 13, 2020). Re: Still Life Synthesis Thread (discussion thread) at the ConwayLife.com forums
External links
- BTS at the Life Lexicon
- BTS at Adam P. Goucher's Catagolue