Section outline

  • The linear partial differential equation of order one

    Introduction:

    In this class, the Linear partial differential equation of order one will be discussed. In mathematics, a first-order partial differential equation is a partial differential equation that involves only the first derivatives of the unknown function of n variables. The equation takes the form

    F(x_{1},\ldots ,x_{n},u,u_{{x_{1}}},\ldots u_{{x_{n}}})=0.\,

    Such equations arise in the construction of characteristic surfaces for hyperbolic partial differential equations, in the calculus of variations, in some geometrical problems, and in simple models for gas dynamics whose solution involves the method of characteristics. If a family of solutions of a single first-order partial differential equation can be found, then additional solutions may be obtained by forming envelopes of solutions in that family. In a related procedure, general solutions may be obtained by integrating families of ordinary differential equations.

    Objectives:

    • to know about the method of characteristics
    • solve by using the Lagrange method

    Lesson Plan:

    • Discussion from a lecture slide
    • Problem-solving
    • Group Work
    • Question and Answering
    • Home Work