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 Exponentially fitted interpolation formulas using three unequally spaced nodes Commun. Korean Math. Soc.Published online September 29, 2021 Kyung Joong Kim Korea Aerospace University Abstract : Our aim is to construct exponentially fitted interpolation formulas using three unequally spaced nodes for an $\omega$-dependent function. The coefficients of the formulas are determined by solving a linear system, and some of the properties of these coefficients are obtained. Numerical results are illustrated with respect to the determinant of the coefficient matrix of the linear system. The errors regarding the formulas are analyzed numerically and approached theoretically. Keywords : exponentially fitted, interpolation MSC numbers : 65D05 Full-Text :

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