Divisor problems in special sets of positive integers.
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Acta Mathematica Universitatis Comenianae. New Series
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Nowak, W.G. (1992)
Acta Mathematica Universitatis Comenianae. New Series
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Conjugacy and disconjugacy criteria are established for the equation where is a locally summable function.
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We establish new efficient conditions sufficient for the unique solvability of the initial value problem for two-dimensional systems of linear functional differential equations with monotone operators.
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