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An estimate for the least uniform deviation from the class of functions with bounded second derivative

机译:具有有界二阶导数的函数类别的最小均匀偏差的估计

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摘要

We consider the problem of uniform approximation of a continuous function on an interval by means of the class of functions with bounded second derivative. We prove an estimate for the least uniform deviation of a function in terms of its local deviations on uniform and nonuniform three-point grids.
机译:我们通过具有二阶导数的函数类来考虑区间上连续函数的均匀逼近问题。我们证明了函数在均匀和非均匀三点网格上的局部偏差的最小均匀偏差估计。

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