Kong, V.P. and Ong, B. H. (2003) Fitting Constrained Continuous Spline Curves. In: Integrating Technology in the Mathematical Sciences (2003), 2003, Universiti Sains Malaysia.
Fitting a curve through a set of planar data which represents a positive quantity requires that the curve stays above the horizontal axis, The more general problem of designing parametric and non-parametric curves which do not cross the given constraint boundaries is considered. Several methods will be presented.
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