Knot Multiplicity at B-spline curve

Knot Multiplicity at B-spline curve

What is knot multiplicity exactly?
  • In the STEP file, the knot muliplicity value from the second value to the second to last value may not be '1'. However, there was only '1' in the study material of SNU open courseware.
  • B-Spline says "A curve is p-k times differentiable at a point where k duplicate knot values occur. The knot values determine the extent of the control of the control points.". I understand the 'knot muliplicity' by control range of control points.
  • Full-multiplicity knot helps me to understand vague meaning of controlling knot value.
 As a result, I couldn't exactly understand the 'knot muliplicity', but I just understood roughly what it meant.

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