Geodesic
Generalized bivariate Hermite fractal interpolation function
Sibirskij žurnal vyčislitelʹnoj matematiki, Tome 24 (2021) no. 2, pp. 117-129.

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Fractal interpolation provides an efficient way to describe the smooth or non-smooth structure associated with nature and scientific data. The aim of this paper is to introduce a bivariate Hermite fractal interpolation formula which generalizes the classical Hermite interpolation formula for two variables. It is shown here that the proposed Hermite fractal interpolation function and its derivatives of all orders are good approximations of the original function even if the partial derivatives of the original functions are non-smooth in nature. 
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S. Jha; A. K. B. Chand; M. A. Navascues. Generalized bivariate Hermite fractal interpolation function. Sibirskij žurnal vyčislitelʹnoj matematiki, Tome 24 (2021) no. 2, pp. 117-129. http://geodesic.mathdoc.fr/item/SJVM_2021_24_2_a0/

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