Differential equations and boundary value problems Differential Equations and Boundary Value Problems Ordinary differential equations and dynamical systems Elliptic Differential Equations and Obstacle Problems Applied partial differential equation with fourier series and boundary value problems Applied partial differential equations:with fourier series and bounday value problems Ordinary differential equations and analytic geometry 并列题名：Applied partial differential equations:with fourier series and bounday value problems Fourier series and boundary value problems Green's Functions and Boundary Value Problems