turning number

名词 n.

英文释义

名词 n.
  1. A version of winding number in which the number of rotations is counted with respect to the tangent of the curve rather than a fixed point.
    — This program illustrates the Whitney-Graustein theorem, that two closed curves (immersions of the circle) in the plane can be deformed into one another without letting go of the immersion property if and only if their turning numbers are the same.

词形变化

turning numbers plural
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