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Necessary Conditions for the Convergence of Cardinal Hermite Splines as their Degree Tends to Infinity

Necessary Conditions for the Convergence of Cardinal Hermite Splines as their Degree Tends to Infinity

Let ${\mathcal {S}_{n,s}}$ denote the class of cardinal Hermite splines of degree n having knots of multiplicity S at the integers. In this paper we show that if ${f_n} \to f$ uniformly on R, where ${f_n} \in {\mathcal {S}_{{i_{n,s}}}} {i_n} \to \infty$ as $n \to \infty$, and f is bounded, …