# David Hilbert

David Hilbert | |||||||||||

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Pattern type | Oscillator | ||||||||||
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Number of cells | 122 | ||||||||||

Bounding box | 33×26 | ||||||||||

Period | 23 | ||||||||||

Mod | 23 | ||||||||||

Heat | 34.6 | ||||||||||

Volatility | 0.71 | ||||||||||

Strict volatility | 0.71 | ||||||||||

Discovered by | Luka Okanishi praosylen | ||||||||||

Year of discovery | 2019 | ||||||||||

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**David Hilbert**^{[1]}^{[note 1]} was the first period-23 oscillator to be discovered. It was found by Luka Okanishi on November 24, 2019^{[2]} based on a partial result by praosylen.^{[1]} It consists of two copies of an engine, itself consisting of a B-heptomino being hassled by two unusual catalysts and a block, supported by a known period-agnostic beehive shuttle mechanism (seen in, for example, an extension of the carnival shuttle). There are several isomers known (including *trans-* versions and different phase offsets), with the one pictured having minimum population and bounding box. A 101-glider synthesis for one of these variants was posted by Goldtiger997 on December 29.^{[3]}

David Hilbert was voted Pattern of the Year for 2019 on the ConwayLife.com forums.^{[4]}

## See also

- p23 honey farm hassler, the only other known p23 oscillator, excluding combinations of that and David Hilbert
- Prime-period oscillator

## Notes

- ↑ Named after German mathematician David Hilbert in reference to his 23 problems.

## References

- ↑
^{1.0}^{1.1}Luka Okanishi (November 25, 2019). Re: Oscillator Discussion Thread (discussion thread) at the ConwayLife.com forums - ↑ Luka Okanishi (November 24, 2019). Re: Oscillator Discussion Thread (discussion thread) at the ConwayLife.com forums
- ↑ Goldtiger997 (December 29, 2019). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
- ↑ Dave Greene (March 16, 2020). Re: POTY 2019 Voting (discussion thread) at the ConwayLife.com forums

## External links

- Patterns
- Oscillators with between 120 and 129 cells
- Periodic objects with minimum population between 120 and 129
- Patterns with between 120 and 129 cells
- Patterns found by Luka Okanishi
- Patterns found by praosylen
- Patterns found in 2019
- Patterns that can be constructed with between 90 and 99 gliders
- Oscillators
- Oscillators with period 23
- Oscillators with mod 23
- Oscillators with heat 34
- Oscillators with volatility 0.71
- Oscillators with strict volatility 0.71
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