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Siteswap


A siteswap is a sequence encountered in juggling in which each term is a positive integer, encoded in binary. The transition rule from one term to the next consists of changing some 0 to 1, subtracting 1, and then dividing by 2, with the constraint that the division by two must be exact. Therefore, if a term is even, the bit to be changed must be the units bit. In siteswaps, the number of 1-bits is a constant.

Each transition is characterized by the bit position of the toggled bit (denoted here by the numeral on top of the arrow). For example,

 111-->^510011-->^21011-->^510101-->^11011-->^2111 
 -->^6100011-->^310101-->^31110-->^0111-->^41011...

The second term is given from the first as follows: 000111 with bit 5 flipped becomes 100111, or 39. Subtract 1 to obtain 38 and divide by two to obtain 19, which is 10011.


See also

Juggling

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References

Juggling Information Service. "Siteswaps." http://www.juggling.org/help/siteswap/.Smith, H. J. "Juggler Numbers." http://www.geocities.com/hjsmithh/Juggler.html.

Referenced on Wolfram|Alpha

Siteswap

Cite this as:

Weisstein, Eric W. "Siteswap." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Siteswap.html

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