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factor of becomes fixed. The knots in-between (and not including) and are called the internal knots.

B-splines can be constructed by means of the Cox-de Boor recursion formula. We start with the B-splines of degree , i.e. piecewise constant polynomials.

:

The higher -degree B-splines are defined by recursion
:

Properties

A B-spline function is a combination of flexible bands that is controlled by a number of points that are called control points,

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