H.A. DZJUBENKO, V.V. LISTOPAD, I.A. SHEVCHUK
COMONOTONE APPROXIMATION POINTWISE ESTIMATES FOR TWICE DIFFERENTIABLE FUNCTIONS
(47K, LaTex)
ABSTRACT. An estimate for polynomial approximation of a twice differentiable
comonotone (i.e. piecewise-monotone) function is obtained in terms
of $k-th$ modulus of continuity of the function in question.