Least squares fitting to univariate data subject to restrictions on the signs of the second differences

Citation:

Demetriou IC, Powell MJD. Least squares fitting to univariate data subject to restrictions on the signs of the second differences. In: Approximation Theory and Optimization, Tributes to M.J.D. Powell . M. D. Buhmann and A. Iserles, Editors. Cambridge, U.K. : Cambridge University Press; 1997. pp. 109-132.