Geodesic
On compactness of a class of first order linear differential operators
Proceedings of the Yerevan State University. Physical and mathematical sciences, no. 2 (2011), pp. 17-21.

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In the present article a class of first order linear differential operators with unbounded coefficients is investigated. The compactness of operators is proved.
Keywords: bounded differential operator, compact differential operator, first order differential operator. 
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V. Zh. Dumanyan. On compactness of a class of first order linear differential operators. Proceedings of the Yerevan State University. Physical and mathematical sciences, no. 2 (2011), pp. 17-21. http://geodesic.mathdoc.fr/item/UZERU_2011_2_a2/

[1] V. Zh. Dumanyan, “On the boundedness of a class of the first order linear differential operators”, Proceedings of the YSU, Physics Mathematics, 2011, no. 1, 3–6

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