Negentropy

Negentropy
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Pattern type	Oscillator
Oscillator type	Billiard table
Number of cells	36
Bounding box	11×12
Period	2
Mod	1
Heat	4
Volatility	0.11
Strict volatility	0.11
Rotor type	Diagonal on-off
Discovered by	Unknown
Year of discovery	Unknown
Rules Outer-totalistic rules B3/S23 – B378/S01235678 Important rules Conway Life # of rules 28 = 256 Isotropic rules B3i/S2-cn3aenr – B2in34cejkqtz5-qr6-n78/S01234-n5678
Glider synthesis Fewest gliders 91 (33†) Catagolue-generated RLE negentropy_synth.rle †Can be constructed with 33 gliders using the reverse caber tosser universal constructor.
Pattern files Plaintext negentropy.cells RLE negentropy.rle
Identifiers apgcode xp2_gg0gba9jz1107ac87066zx3213

Negentropy is a period-2 oscillator related to the Hertz oscillator. Somewhat surprisingly, these share the same stator despite having different rotors (similar to pinwheel and clock 2). One phase of the Hertz oscillator, whose period is 8, has a single live cell in its rotor, adhering to a short side of the stator. Negentropy's rotor has two live cells huddled in one corner of the stator, and period 2. Finally, two radially opposed live cells create an oscillator of period 1 - a still life - in two different ways.

The smallest casing of the oscillator uses two blocks and two snakes as induction coils stabilizing the edges.

Goldtiger997 found a 174-glider synthesis of this oscillator on February 16, 2020. Martin Grant improved this to 91 gliders for the canonical version on March 8, with 37 gliders to create a stator variant.

See also

• Cauldron

External links

• Negentropy at the Life Lexicon

• Negentropy at Adam P. Goucher's Catagolue