Dear everyone, Now I am trying to solve a Laplace equation by using the example7.C in Overture.v23/primer. Here is one problem about this code: *coeff.applyBoundaryConditionCoefficients(0,0,dirichlet, allBoundaries);* ** This is the code which assigns the type of the boundary (*Dirichlet* or * Neumann)* and the coefficient Well, the problem is: where can I find the explanation of the function *coeff.applyBoundaryConditionCoefficients? *Because I want to assign some boundary as another type. For example: I want to assign the left boundary of grid 1 as the *Dirichlet type* while the right one is *Neumann type*. If someone knows that, hope you can share it to me. Justin