Hyperbolic partial differential equations and geometric optics 并列题名:Hyperbolic partial differential equations and geometric optics Fractional partial differential equations and their numerical solutions Elliptic partial differential equations of second order Stochastic differential equations and applications 书名原文:Elliptic partial differential equations of second order Partial differential equations: an introduction 并列题名:Stochastic differential equations and applications Ordinary differential equations and analytic geometry Modern methods in partial differential equations :anIntroduction