Difference between revisions of "P44 pi-heptomino hassler"
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==Gallery== | == Gallery == | ||
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==Other p44 pi-heptomino hassler== | == Other p44 pi-heptomino hassler == | ||
In [[Mitchell Riley]]'s mvr_catforce_stdin census on Catagolue, there have occurred many variants of an unrelated such hassler, the minimal form of which is shown below. | In [[Mitchell Riley]]'s mvr_catforce_stdin census on Catagolue, there have occurred many variants of an unrelated such hassler, the minimal form of which is shown below. | ||
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==See also== | == See also == | ||
* [[Mold on Jason's p22]] | * [[Mold on Jason's p22]] | ||
* [[Period-50 glider gun]] | * [[Period-50 glider gun]] | ||
* [[Period-44 MWSS gun]] | * [[Period-44 MWSS gun]] | ||
==References== | == References == | ||
<references> | <references> | ||
<ref name="post145359">{{LinkForumThread | <ref name="post145359">{{LinkForumThread | ||
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* {{LinkCatagolue|xp44_y83pm4kozy7ey3ezz66y7ca2acy766zggy7o808oy7ggz11y8111y811zy7oy3ozy710ckgkc01zyc123|patternname=p44 pi-heptomino hassler}} | * {{LinkCatagolue|xp44_y83pm4kozy7ey3ezz66y7ca2acy766zggy7o808oy7ggz11y8111y811zy7oy3ozy710ckgkc01zyc123|patternname=p44 pi-heptomino hassler}} | ||
[[Category:Pi-heptomino hasslers|044]] | [[Category:Pi-heptomino hasslers|044]] | ||
{{DISPLAYTITLE:p44 pi-heptomino hassler}} | {{DISPLAYTITLE:p44 pi-heptomino hassler}} | ||
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Revision as of 15:57, 7 August 2024
| p44 pi-heptomino hassler | |||||||||||
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| Pattern type | Oscillator | ||||||||||
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| Number of cells | 72 | ||||||||||
| Bounding box | 31 × 42 | ||||||||||
| Period | 44 (mod: 44) | ||||||||||
| Heat | 66 | ||||||||||
| Volatility | 0.94 | 0.94 | ||||||||||
| Kinetic symmetry | .e | ||||||||||
| Discovered by | David Buckingham | ||||||||||
| Year of discovery | 1992 | ||||||||||
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- For other period-44 pi-heptomino hasslers, see Period-44 pi-heptomino hasslers.
p44 pi-heptomino hassler is a period-44 oscillator discovered by David Buckingham on April 2, 1992.[1] It was improved to another form by Noam Elkies in April 1996 and to the current form by iNoMed[2] based on a reaction by cvojan on May 10, 2022.[3] The oscillator consists of two pi-heptominos being hassled by two of a transparent catalyst (originally two heavyweight emulators) and four blocks. On July 25, 2022, Mitchell Riley found a stabilization using only still lifes, specifically four eater 2s and two blocks.[4]
Buckingham used two copies of this oscillator to make the first period-44 glider gun. This became obsolete in October 1996 when Buckingham found a gun that only used one copy of the oscillator.
In 1994 Dean Hickerson found a way to double the oscillator's period by adding two molds, creating the first gliderless period 88 oscillator. David Buckingham also found a way to triple the period before August 1994. Doubling the period with molds also works with the related p50 pi-heptomino hassler, but tripling in the same way 44 becomes 132 does not. In 2022, on the same day as the eater 2 stabilization above, dani found a non-trivial period-sextupled version of the oscillator, which also works with other versions of the catalyst.[5]
| The original form of the oscillator (click above to open LifeViewer) RLE: here Plaintext: here Catagolue: here |
Gallery
| Buckingham's original period 44 gun and its subsequent improvement, as well as the small period-44 MWSS gun found by Dietrich Leithner (click above to open LifeViewer) RLE: here Plaintext: here |
| The smallest known period-44 glider gun (by bounding box) (click above to open LifeViewer) |
Other p44 pi-heptomino hassler
In Mitchell Riley's mvr_catforce_stdin census on Catagolue, there have occurred many variants of an unrelated such hassler, the minimal form of which is shown below.
| Mitchell Riley's p44 pi-heptomino hassler, with a 70-cell minimum population (click above to open LifeViewer) Catagolue: here |
See also
References
- ↑ Dean Hickerson's oscillator stamp collection.
- ↑ iNoMed (May 10, 2022). Re: Oscillator Discussion Thread (discussion thread) at the ConwayLife.com forums
- ↑ cvojan (May 10, 2022). Re: Catalyst Discussion Thread (discussion thread) at the ConwayLife.com forums
- ↑ Mitchell Riley (July 25, 2022). Re: Oscillator Discussion Thread (discussion thread) at the ConwayLife.com forums
- ↑ dani (July 25, 2022). Re: Oscillator Discussion Thread (discussion thread) at the ConwayLife.com forums
External links
- Patterns
- Oscillators with 72 cells
- Periodic objects with minimum population 72
- Patterns with 72 cells
- Patterns found by David Buckingham
- Patterns found in 1992
- Patterns that can be constructed with 28 gliders
- Outer-totalistically endemic patterns
- Oscillators
- Oscillators with period 44
- Oscillators with mod 44
- Oscillators with heat 66
- Oscillators with volatility 0.94
- Oscillators with strict volatility 0.94
- Oscillators with .e symmetry
- Pi-heptomino hasslers