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 ?
Both ladies hats are adorned with an eagle plume, they also have a plume that is inserted at the top of their right hair braid, extending upward.
Ros Alstead, the Mental Health Trust's director of nursing, said: "This policy does not require staff to remove hair braids. Long hair, whether braided or not, should be tied back or up during a clinical procedure or when preparing food for safety and hygIiene reasons."
The Arizona Biltmore Resort and Spa (arizonabiltmore.com) in Phoenix has a teen menu, featuring nail art, hair braids and henna body-painting.
OLYMPIC champion Denise Lewis yesterday revealed she had shed her trademark hair braids.
We've checked her clothing and pockets for metal objects and even her hair braids. Nicola isn't pinching anything and she hasn't got a tin leg."
Like a tween gone crazy with a glue gun and her toy box, Miley has dreamed up monstrosities that include a mask made of teddies and multi-coloured hair braids.