Academy of Mathematics and Systems Science, CAS Colloquia & Seminars | Speaker: | 黎海彤,长春工业大学 | Inviter: | | Title: | Polygonal Approxmations of Solutions of the Intial Value Problem for a Conservation Law (I) (II) | Time & Venue: | 2021.08.12 09:30-11:30 思源楼S809 | Abstract: | In this talk, we consider the polygonal approxmations of solutions of the intial value problem for a conservation law. The solution which satisfies the condition proposed by Hopf is constructed in the special case where $u_0(x)$ is a step function and $f(u)$ is piecewise linear. For $u_0(x)$ a step function, a local solution can be constructed as a superposition of solutions of the Riemann problem. Furthermore, the local solution can be extended onto a global solution. Then, we generalize the method to the 1D compressible Euler equations with time-dependent damping trem $ -\frac{\mu}{(1+t)^\lambda}u $. | | | |