New answers tagged


You would need to linearize the problem. I prefer to do it before discretization but it's possible to do also after discretization. (I'm a bit skeptical of linearization after discretization because I have never looked into the details. In general, discretization and linearization steps do not commute.) In the following I assume that the equation is actually ...


The equation you have is $$ M \dot U = B(U) U $$ where $B$ is a matrix which depends on the solution and is given by $$ B_{ij} = \int a(u_h) \phi_i' \phi_j' dx $$

Top 50 recent answers are included