On Calculation of Correction for the Refraction by means of Refractive Index and equation by approximating curved

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Lviv Politecnic National University
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1. Zel'novich Ja.B., Myshkis A.D. Jelementy prikladnoj matematiki.- M.: Nauka, 1967.

2. Smirnov V.I. Kurs vysshej matematiki.- M.: Nauka, 1974, t.4.