Geodesic
An Application of a Theorem of J. Czipszer and G. Freud to a Problem of Simultaneous Approximation
Canadian mathematical bulletin, Tome 12 (1969) no. 2, pp. 193-201

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In an earlier work [12] we considered the case of (0, 2, 3) interpolation by trigonometric polynomials at the points , i = 0, 1,..., n-1. By (0, 2, 3) interpolation we mean the problem of finding a trigonometric polynomial of suitable order whose values, second and third derivatives are prescribed at some given points. An interesting distinction between the (0, 2) interpolation studied by the Hungarian mathematician O. 
Varma, A.K. An Application of a Theorem of J. Czipszer and G. Freud to a Problem of Simultaneous Approximation. Canadian mathematical bulletin, Tome 12 (1969) no. 2, pp. 193-201. doi: 10.4153/CMB-1969-021-6
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     title = {An {Application} of a {Theorem} of {J.} {Czipszer} and {G.} {Freud} to a {Problem} of {Simultaneous} {Approximation}},
     journal = {Canadian mathematical bulletin},
     pages = {193--201},
     year = {1969},
     volume = {12},
     number = {2},
     doi = {10.4153/CMB-1969-021-6},
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