On positiveness of the Cauchy function of a~singular linear functional differential equation
Izvestiâ vysših učebnyh zavedenij. Matematika, no. 10 (2013), pp. 16-23.

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We study first-order functional differential equations which are singular in the independent variable, establish criteria for the constant sign property of the Cauchy function, and prove an assertion analogous to the Vallée-Poussin theorem.
Keywords: functional differential equations, Cauchy function.
Mots-clés : singular equations
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I. M. Plaksina. On positiveness of the Cauchy function of a~singular linear functional differential equation. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 10 (2013), pp. 16-23. http://geodesic.mathdoc.fr/item/IVM_2013_10_a1/

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