second order difference meaning in English

二阶差分

Oscillation of second order difference operator
一类二阶差分算子的振动性
Positive solutions of second order difference equations with positive and negative coefficients
具正负系数二阶差分方程的正解
Some new sufficient conditions for all the solutions of the nonlinear damped the second order difference equations ( 1 ) to be oscillations are given
摘要本文给出了二阶非线性阻尼差分方程(方程式略)一切解均为振动的若干新的充分条件。
In section 4 , , e point out and correct some existing errors for the asymptotic behavior of nonlinear second order difference equation in " applied mathematics letters " , and make some ne , conclusions
在第四节我们指出并纠正《 appliedmathematicsletters 》上关于非线性二阶差分方程渐近性的错误，并给出了新的结论。