braid

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braid

[brād]
(mathematics)
A braid of order n consists of two parallel lines, sets of n points on each of the lines with a one-to-one correspondence between them, and n nonintersecting space curves, each of which connects one of the n points on one of the parallel lines with the corresponding point on the other; the space curves are configured so that no curve turns back on itself, in the sense that its projection on the plane of the parallel lines lies between the parallel lines and intersects any line parallel to them no more than once, and any two such projections intersect at most a finite number of times.
References in periodicals archive ?
Normally I think hair braids are best suited to afro hair and black skin, as Caucasian hair doesn't have the texture needed, and a white scalp tends to look pink under the tension of the braids, but Jordan's looked fab
OLYMPIC champion Denise Lewis yesterday revealed she had shed her trademark hair braids.
There was a variety of "hairy" ideas including pigtails, pink wigs, fake moustaches, hats and hair braids, some of which were made by our support and therapy patients.
He has written to the UK's five biggest supermarkets asking them to stock alternative goods such as bright balloons and hair braids alongside more traditional Halloween products.
A MUM branded her daughter's school racist after it banned white children from wearing hair braids - but not black pupils.
THE mystery of David Beckham's hair braids was solved last night - he copied the idea from a 16-year-old soccer trainee.