常見例句雙語例句By using a fixed point theorem of mixed monotone operators in cone, this paper studied a fourth-order nonlinear singular boundary value problem, namely a class of elastic beam equation.利用錐上的混合單調(diào)算子不動(dòng)點(diǎn)定理,本文研究了一類四階奇異非線性微分方程的邊值問題,即一類彈性梁方程問題。 返回 monotone class theorem