您要查找的是不是：
- Duffing型方程Duffing equation
- 时滞Duffing型方程delay Duffing equation
- 高阶Duffing型方程Dulling equation
- 一类具复杂偏差变元的Duffing型方程的周期解Periodic solutions to a type of Duffing equation with complex deviating argument
- Bq型方程Bq-type equation
- 椭园型方程elliptic equation
- Abel型方程Abel ODE
- Dufllng型方程dutffing equation
- 超抛物型方程ultraparabolic equation
- 非退化型方程nonsinglar equation
- 抛物型方程纽parabolic systems
- Dufling型方程Duffing equation
- 3维抛物型方程three-dimension parabolic equation
- Riccati型方程Riccati equation
- 三维抛物型方程Three-dimension parabolic equation
- 退缩椭圆型方程degenerate Elliptical equation
- 二维抛物型方程equation of two-dimensional parabolic type
- Liénard型方程Liénard equations
- 脉冲抛物型方程impulse parabolic equation
- 一阶双曲型方程1-order hyperbolic equation
