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 ?
Today, many traditional dancers, even without hair braids, will attach these decorative sticks into the tie string at the top of the spreader.
For me, the vivid folk costumes, complete with long hair braids, and the unusual stamping, jumping, shaking choreography made this piece stand out from the rest.
A spokesman for Ramsgate Holy Trinity Primary School in Kent - rated "Outstanding" by Ofsted - said hair bands and ribbons must be "made of dark colours" and that hair braids are "not allowed".
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.