Hertz oscillator

	Hertz oscillator
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Pattern type	Oscillator
Oscillator type	Billiard table
Number of cells	35
Bounding box	11 × 12
Period	8 (mod: 4)
Heat	3
Volatility	0.19 \| 0.19
Kinetic symmetry	n.e
Discovered by	JHC group
Year of discovery	1970
Rules
Outer-totalistic rules	B3/S23 – B378/S23678
# of rules	25 = 32
Isotropic rules	B3eiy/S2-cn3aeinr – B2in34acejkqz5-jkqr6ace78/S1c234-nt5-e678
Glider synthesis
Fewest gliders (canonical)	58†
Catagolue-generated RLE (canonical)	synthesis
Fewest gliders (cheapest variant)	11
Catagolue-generated RLE (cheapest variant)	synthesis
Uploaded synthesis RLE	hertzoscillator_synth.rle
	†Can be constructed with 15 gliders using the reverse caber tosser universal constructor.
Pattern files
Plaintext	hertzoscillator.cells
RLE	hertzoscillator.rle
Identifiers
apgcode (canonical)	xp8_gg0gba9jz11078987066zx3213
apgcode (cheapest variant)	xp8_0354ljgzcc0fghgf0352zy1ca2ac
Pentadecathlon ID	35P8.2

Hertz oscillator is a period-8 oscillator that was found in 1970 by John Conway's group.^[1] It features two blocks and two snakes used as induction coils (i.e. to stabilize the sides).

An 11-glider synthesis is known for a stator variant of this oscillator which uses one block, one boat and two houses for stabilization. On February 10, 2020, Matti Ward found a 58-glider synthesis for the canonical version of this oscillator.^[2]

References

↑ Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.
↑ Matti Ward (February 10, 2020). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums