Difference between revisions of "P11 bumper"
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'''P11 bumper''' is a periodic [[colour-preserving]] [[glider]] [[reflector]] with a minimum [[repeat time]] of 44 [[ticks]]. Unlike the p5 through p8 cases where Noam Elkies' domino-spark based [[bouncer]] reflectors are available, no small period-22 [[colour-changing]] reflector is known. A [[stable]] [[Snark]] reflector can be substituted for any [[bumper]]. This changes the timing of the output glider, which can be useful for rephasing periodic glider [[stream]]s. | '''P11 bumper''' is a periodic [[colour-preserving]] [[glider]] [[reflector]] with a minimum [[repeat time]] of 44 [[ticks]]. Unlike the p5 through p8 cases where Noam Elkies' domino-spark based [[bouncer]] reflectors are available, no small period-22 [[colour-changing]] reflector is known. A [[stable]] [[Snark]] reflector can be substituted for any [[bumper]]. This changes the timing of the output glider, which can be useful for rephasing periodic glider [[stream]]s. | ||
A period 22 bumper can be constructed using [[36P22]], but the p11 variant is smaller in terms of [[bounding box]] and is compatible with all the same glider streams. In practice, even the p11 bumper is not useful with regular input streams below period 121, because lower-period bumpers can be used to reflect all smaller multiples of 11 for which the bumper reaction can be made to work. | A period 22 bumper can be constructed using [[36P22]], but the p11 variant is smaller in terms of [[bounding box]] and is compatible with almost all of the same glider streams. The only advantage of the 36P22-based bumper reflector is its lower repeat time (22 ticks instead of 44). In practice, even the p11 bumper is not useful with regular input streams below period 121, because lower-period bumpers can be used to reflect all smaller multiples of 11 for which the bumper reaction can be made to work. | ||
==External links== | ==External links== | ||
Revision as of 21:26, 3 April 2019
| p11 bumper | |||||
| View static image | |||||
| Pattern type | Reflector Oscillator | ||||
|---|---|---|---|---|---|
| Number of cells | 85 | ||||
| Bounding box | 24 × 17 | ||||
| Angle | 90° | ||||
| Period | 11 | ||||
| Heat | Unknown | ||||
| Discovered by | Tanner Jacobi Matthias Merzenich | ||||
| Year of discovery | 2016 | ||||
| |||||
P11 bumper is a periodic colour-preserving glider reflector with a minimum repeat time of 44 ticks. Unlike the p5 through p8 cases where Noam Elkies' domino-spark based bouncer reflectors are available, no small period-22 colour-changing reflector is known. A stable Snark reflector can be substituted for any bumper. This changes the timing of the output glider, which can be useful for rephasing periodic glider streams.
A period 22 bumper can be constructed using 36P22, but the p11 variant is smaller in terms of bounding box and is compatible with almost all of the same glider streams. The only advantage of the 36P22-based bumper reflector is its lower repeat time (22 ticks instead of 44). In practice, even the p11 bumper is not useful with regular input streams below period 121, because lower-period bumpers can be used to reflect all smaller multiples of 11 for which the bumper reaction can be made to work.
External links
- p11 bumper at the Life Lexicon