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B-spline
Spline function / From Wikipedia, the free encyclopedia
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In the mathematical subfield of numerical analysis, a B-spline or basis spline is a spline function that has minimal support with respect to a given degree, smoothness, and domain partition. Any spline function of given degree can be expressed as a linear combination of B-splines of that degree. Cardinal B-splines have knots that are equidistant from each other. B-splines can be used for curve-fitting and numerical differentiation of experimental data.
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In computer-aided design and computer graphics, spline functions are constructed as linear combinations of B-splines with a set of control points.