Geodesic
The Plank function approximation
Matematičeskoe modelirovanie, Tome 24 (2012) no. 9, pp. 63-69.

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In thermal radiation transport problems often it is required to calculate the integral from Plank function on a finite interval of spectrum. The paper presents analytical approximation of this integral and related integrals.
Keywords: thermal radiation, Plank function, incomplete Riemann zeta function, analytical approximation. 
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     author = {A. V. Shilkov},
     title = {The {Plank} function approximation},
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A. V. Shilkov. The Plank function approximation. Matematičeskoe modelirovanie, Tome 24 (2012) no. 9, pp. 63-69. http://geodesic.mathdoc.fr/item/MM_2012_24_9_a4/

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