科研之友
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摘要
Some oscillation criteria are established for the second-order nonlinear neutral differential equations of mixed type [(x(t) + p(1)x(t - tau(1)) + p(2)x(t + tau(2)))(gamma)]'' = q(1)(t)x(gamma)(t - sigma(1)) + q(2)(t)x(gamma)(t + sigma(2)), t >= t(0), where gamma >= 1 is a quotient of odd positive integers. Our results generalize the results given in the literature.
