... 凸样条内插 convex spline interpolation 俄罗斯凸条布 Russian cord 厚实凸条布 Bedford cord ...
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A necessary and sufficient condition is derived for the existence of monotone and convex interpolation by a cubic spline with an additional knot inserted between each pair of data points.
本文给出用三次样条在两两节点之间引进一个外加节点的条件下，存在凸而单调的插值的充分必要条件。
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