Jormungant's G-to-H

Jormungant's G-to-H is either of two closely related stable 2G-to-H converters discovered by Louis-François Handfield (pseudonym: Jormungant) in 2018.[1] It consists of a block, a BTS, and an eater 2 (for the bottom variant) which convert two synchronized gliders into a Herschel with repeat time 47. (In the infobox pattern, a ghost Herschel marks the output location.) It is the basis of various low period guns.

Jormungant's G-to-H
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Pattern type Conduit
Conduit type Stable
Input Glider
Output Herschel
Number of cells 39, 60
Bounding box 27×57
Discovered by Louis-François Handfield
Year of discovery 2018

Unlike most glider-to-Herschel converters, this converter's initial glider-block collision converts the block into a honey farm predecessor, instead of a pi-heptomino. The second glider, along with the BTS catalyst, convert the pre–honey farm into a B-heptomino, which forms a block at the original location and produces a Herschel output. There are two possible positions for this second glider; one of these requires the presence of an additional eater 2, as well as replacing the BTS with an equivalent larger catalyst with better clearance.

Without this, it would take 3 gliders to create a Herschel by using the glider synthesis of a B-heptomino, plus one extra glider to delete the B-heptomino's block. In cases such as the original period-52 glider gun, this would not be sufficient to create an over-unity reaction due to the difficulty of extracting 4 gliders from an output Herschel at such a low period. The discovery of this fast 2G-to-H was thus a key innovation allowing these low-period guns to be constructed.

See also

References
  1. Louis-François Handfield (April 4, 2018). Re: Thread For Your Accidental Discoveries (discussion thread) at the ConwayLife.com forums
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