G-to-LWSS
| G-to-LWSS | |||||||||
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| Pattern type | Conduit | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Conduit type | Stable | ||||||||
| Input | Glider | ||||||||
| Output | LWSS | ||||||||
| Number of cells | 432 | ||||||||
| Bounding box | 168 × 75 | ||||||||
| Step | Unknown | ||||||||
| Recovery time (ignoring FNG if any) |
78 ticks | ||||||||
| Minimum overclock period (ignoring FNG if any) |
74 ticks | ||||||||
| Spartan? | No | ||||||||
| Discovered by | Chris Cain | ||||||||
| Year of discovery | 2015 | ||||||||
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G-to-LWSS is the shorthand for glider-to-LWSS converter. It may refer to the specific stable converter shown in the infobox at right, constructed by Chris Cain in October 2015.[1] It begins with a syringe followed by the H-to-2G duplicator as in RNE-19T84; one output is fed into another syringe, then passes F117 and HNE1T22, whereas the other is reflected by Snark before entering a chain of syringe, F117 and H-to-block converter. Its recovery time at 78 ticks matches that of the syringe.
Many other composite G-to-LWSS converters have been constructed. The first G-to-LWSS was constructed by Paul Callahan on May 17, 1997. Stephen Silver constructed a smaller version, using the same glider/Herschel/pre-pre-block interaction shown at right, on September 24, 1997.
A different reaction, which directly produces an LWSS at the expense of a block, was found in April 2015. Unlike the previous synchronized reaction, the two signals (Herschel and the block source) involved here can be asynchronous. Soon Martin Grant and Adam P. Goucher completed a working Herschel converter with an extra Herschel output,[2] which was later suppressed by Chris Cain with simplified cleanup.[3] This composite conduit is now shown in the collection as PS12T565L, starting with a pi-heptomino. It can be attached to a standard HF95P and syringe, but due to the backward-travelling LWSS, the resulting relatively small G-to-LWSS has a much larger recovery time than the converter in the infobox.
A third choice with smaller bounding box than that in the infobox is available, though its repeat time at 165 ticks is more than doubled. Taking inspiration from a periodic conduit created on September 30, 1995 (which is available at the end of David Buckingham's article), Louis-François Handfield in February 2021 found an almost stable converter where a block would be displaced by three cells after reaction, and Adam P. Goucher managed to restore it with another Herschel. [4]
See also
References
- ↑ Chris Cain (October 15, 2015). Re: The Hunting of the New Herschel Conduits (discussion thread) at the ConwayLife.com forums
- ↑ Adam P. Goucher (April 25, 2015). Re: Thread For Your Accidental Discoveries (discussion thread) at the ConwayLife.com forums
- ↑ Chris Cain (May 3, 2015). Re: The Hunting of the New Herschel Conduits (discussion thread) at the ConwayLife.com forums
- ↑ Adam P. Goucher (February 13 , 2021). Re: The Hunting of the New Herschel Conduits (discussion thread) at the ConwayLife.com forums
External link
Glider-to-spaceship converters at Paul Callahan's Page of Conway's Life Miscellany