形如d2x/dt2+f(x)dx/dt+sinx=0方程解的有界性
형여d2x/dt2+f(x)dx/dt+sinx=0방정해적유계성
On the Boundedness of the Equation with Form of d2x/dt2+f(x)dx/dt+sinx=0
저자의 최근 논문