Ideal ring bundle
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Ideal ring bundle (IRB) is a mathematical term which means an n-stage cyclic sequence of semi-measured terms, e.g. integers for which the set of all circular sums enumerates row of natural numbers by fixed times. The circular sum is called a sum of consecutive terms in the n-sequence of any number of terms (from 1 to n − 1).
[edit] Examples
For example, the cyclic sequence (1, 3, 2, 7) is an Ideal Ring Bundle because four (n = 4) its terms enumerate of all natural numbers from 1 to n(n − 1) = 12 as its starting term, and can be of any number of summing terms by exactly one (R = 1) way:
- 1,
- 2,
- 3,
- 4 = 1 + 3,
- 5 = 3 + 2,
- 6 = 1 + 3 + 2,
- 7,
- 8 = 7 + 1,
- 9 = 2 + 7,
- 10 = 2 + 7 + 1,
- 11 = 7 + 1 + 3,
- 12 = 3 + 2 + 7,
- 13 = 1 + 3 + 2 + 7.
The cyclic sequence (1, 1, 2, 3) is an ideal ring bundle also, because four (n = 4) its terms enumerate all numbers of the natural row from 1 to n(n − 1)/R = 6 as its starting term, and can be of any number of summing terms by exactly two (R = 2) ways:
- 1, 1
- 2, 2 = 1 + 1
- 3, 3 = 2 + 1
- 4 = 3 + 1, 4 = 1 + 1 + 2
- 5 = 2 + 3, 5 = 3 + 1 + 1
- 6 = 1 + 2 + 3, 6 = 2 + 3 + 1
[edit] References
- Синтез оптимальних комбінаторних систем. - Львів: Вища школа, 1989.- 168 с.
- «Multi-dimensional Systems Based on Perfect Combinatorial Models», IEEE, Multidimensional Systems: Problems and Solutions, #225, London, 1998.
