关于奇异二阶微分方程(Φ(X’))’+f(t,X)=0的某些可解准则
Some Existence Principles for the Singular Second Order Differential Equation(Ф(x'))' + f(t, x) = 0
{{custom_ref.label}} |
{{custom_citation.content}}
{{custom_citation.annotation}}
|
/
〈 | 〉 |