Geodesic
Approximation of a Function and its Derivatives by Entire Functions of Several Variables
Canadian mathematical bulletin, Tome 31 (1988) no. 4, pp. 495-499

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The paper gives a good approximation of a Ck function on Rn and its derivatives by the restriction of an entire function on Cn and its derivatives respectively.
DOI : 10.4153/CMB-1988-071-1
Mots-clés : 32A15, 41A30 
Gauthier, Paul M. Approximation of a Function and its Derivatives by Entire Functions of Several Variables. Canadian mathematical bulletin, Tome 31 (1988) no. 4, pp. 495-499. doi: 10.4153/CMB-1988-071-1
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     title = {Approximation of a {Function} and its {Derivatives} by {Entire} {Functions} of {Several} {Variables}},
     journal = {Canadian mathematical bulletin},
     pages = {495--499},
     year = {1988},
     volume = {31},
     number = {4},
     doi = {10.4153/CMB-1988-071-1},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1988-071-1/}
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