Difference between revisions of "T-nosed p4"
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{{Oscillator | {{Oscillator | ||
'''T-nosed p4''' is a | |name = T-nosed p4 | ||
|pname = tnosedp4 | |||
|f1 = T-nose | |||
|c = 31 | |||
|bx = 11 | |||
|by = 12 | |||
|p = 4 | |||
|m = 4 | |||
|h = 15 | |||
|v = 0.55 | |||
|sv = 0.49 | |||
|discoverer = Robert Wainwright | |||
|discoveryear = 1989 | |||
|rulemin = B3/S23 | |||
|rulemax = B3/S0238 | |||
|rulespecial = [[Conway's Game of Life|Conway Life]] | |||
|isorulemin = B3-ceky/S23-acjy | |||
|isorulemax = B2n34ceqryz5-eqr6-ik7c/S01c234-airt5-in6-c7c8 | |||
|synthesis = 52 | |||
|synthesisRLE = true | |||
|plaintext = true | |||
|rle = true | |||
|animated = 1 | |||
|viewerconfig = #C [[ TRACKLOOP 4 0 0 GPS 2 THUMBSIZE 2 ]] | |||
|apgcode = xp4_35s2e0e2s53zx1iqi1 | |||
|pentadecathlonid = 31P4.1 | |||
}} | |||
'''T-nosed p4''' is a {{period|4}} [[oscillator]] that was found in October {{year|1989}} by [[Robert Wainwright]].<ref>{{CiteHickersonOscillators|accessdate=March 14, 2020}}</ref> It can be used as a [[filter]] that deletes every other [[lightweight spaceship]] in a stream of [[period]] 4n + 2.<ref>{{CiteLexicon|file=lex_f.htm#filter|name=Filter|accessdate=March 15, 2009}}</ref> A smaller variant was posted by [[Tanner Jacobi]] on December 4, 2017,<ref name="post53407" /> and a {{gliders|79}} [[synthesis]] of said variant was found by Jacobi and [[Mark Niemiec]] on May 8, {{year|2019}}.<ref name="post75887" /> | |||
{| | |||
|- | |||
| {{EmbedViewer | |||
|viewerconfig = #C [[ AUTOSTART GPS 2 LOOP 4 THUMBLAUNCH THUMBSIZE 2 THEME 6 ZOOM 16 HEIGHT 320 ]] | |||
|pname = tnp4v | |||
|position = center | |||
|caption = Variant based on the [[overweight emulator]]<br> | |||
}} | |||
|| {{EmbedViewer | |||
|viewerconfig = #C [[ AUTOSTART GPS 2 LOOP 4 THUMBLAUNCH THUMBSIZE 2 THEME 6 ZOOM 16 HEIGHT 320 ]] | |||
|pname = tnosedp4smaller | |||
|position = center | |||
|caption = Smaller 25-cell variant<br> | |||
}} | |||
|} | |||
==See also== | ==See also== | ||
Line 6: | Line 49: | ||
==References== | ==References== | ||
<references /> | <references> | ||
<ref name="post53407">{{LinkForumThread | |||
|format = ref | |||
|title = Re: Thread for your unsure discoveries | |||
|p = 53407 | |||
|author = Tanner Jacobi | |||
|date = December 4, 2017 | |||
}}</ref> | |||
<ref name="post75887">{{LinkForumThread | |||
|format = ref | |||
|title = Re: Synthesising Oscillators | |||
|p = 75887 | |||
|author = Mark Niemiec | |||
|date = May 8, 2019 | |||
}}</ref> | |||
</references> | |||
==External links== | ==External links== | ||
{{LinkLexicon|lex_t.htm#tnosedp4}} | {{LinkLexicon|lex_t.htm#tnosedp4}} | ||
{{LinkCatagolue|xp4_35s2e0e2s53zx1iqi1}} | {{LinkCatagolue|xp4_35s2e0e2s53zx1iqi1}} | ||
{{LinkCatagolue|xp4_x33oaq08sz8e12453|patternname=T-nosed p4 (smaller variant)}} | |||
{{LinkPentadecathlonObject|31P4.1}} | |||
{{Symmetry|orthogonal2}} | {{Symmetry|orthogonal2}} | ||
{{Sparker|p=4|strength=weak}} |
Revision as of 15:21, 14 March 2020
T-nosed p4 | |||||||||||
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Pattern type | Oscillator | ||||||||||
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Oscillator type | T-nose | ||||||||||
Number of cells | 31 | ||||||||||
Bounding box | 11 × 12 | ||||||||||
Period | 4 | ||||||||||
Mod | 4 | ||||||||||
Heat | 15 | ||||||||||
Volatility | 0.55 | ||||||||||
Strict volatility | 0.49 | ||||||||||
Discovered by | Robert Wainwright | ||||||||||
Year of discovery | 1989 | ||||||||||
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T-nosed p4 is a period-4 oscillator that was found in October 1989 by Robert Wainwright.[1] It can be used as a filter that deletes every other lightweight spaceship in a stream of period 4n + 2.[2] A smaller variant was posted by Tanner Jacobi on December 4, 2017,[3] and a 79-glider synthesis of said variant was found by Jacobi and Mark Niemiec on May 8, 2019.[4]
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See also
References
- ↑ Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.
- ↑ "Filter". The Life Lexicon. Stephen Silver. Retrieved on March 15, 2009.
- ↑ Tanner Jacobi (December 4, 2017). Re: Thread for your unsure discoveries (discussion thread) at the ConwayLife.com forums
- ↑ Mark Niemiec (May 8, 2019). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
External links
- T-nosed p4 at the Life Lexicon
- 31P4.1 at Heinrich Koenig's Game of Life Object Catalogs
Categories:
- Patterns
- Oscillators with 31 cells
- Periodic objects with minimum population 31
- Patterns with 31 cells
- Patterns found by Robert Wainwright
- Patterns found in 1989
- Patterns that can be constructed with between 50 and 59 gliders
- Oscillators
- T-noses
- Oscillators with period 4
- Oscillators with mod 4
- Oscillators with heat 15
- Oscillators with volatility 0.55
- Oscillators with strict volatility 0.49
- Patterns with bilateral orthogonal symmetry
- Sparkers
- Sparkers with period 4
- Weak sparkers