Geodesic
Lebesgue Constants for Cardinal -Spline Interpolation
Canadian journal of mathematics, Tome 29 (1977) no. 2, pp. 441-448

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Recently the theory of cardinal polynomial spline interpolation was extended to cardinals -splines [3]. Let be a polynomial with only real zeros. Denote the set of zeros by . If is the associated differential operator, the null-space 
Tzimbalario, J. Lebesgue Constants for Cardinal -Spline Interpolation. Canadian journal of mathematics, Tome 29 (1977) no. 2, pp. 441-448. doi: 10.4153/CJM-1977-047-4
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