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Results tagged with combinatorics
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user 18662
Combinatorics (combinatorial analysis) is a branch of mathematics that studies the discrete objects, the set (a combination, permutation, deployment and transfer of elements) and the relationship to them (eg, partial order).
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Algorithm to generate all vectors of integers with magnitude between $n\pm \delta$
What about a simple nested loop to give you one octant of the solution, which can then be copied due to symmetry:
$i$ from 0 to $d+n$
$j$ from 0 to $\sqrt{(d+n)^2-i^2}$
$k$ from $\sqrt{(d-n)^2-i^2- …
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