Delil, A2024-07-182024-07-181687-1847http://akademikarsiv.cbu.edu.tr:4000/handle/123456789/2384We consider second-order difference expressions, with complex coefficients, of the form w(n)(-1)[-Delta(p(n-1)Delta x(n-1)) + q(n)x(n)] acting on infinite sequences. The discrete analog of some known relationships in the theory of differential operators such as Dirichlet, conditional Dirichlet, weak Dirichlet, and strong limit-point is considered. Also, connections and some relationships between these properties have been established.EnglishINEQUALITYEXPRESSIONSEQUATIONSArticle