Help me

I wanted to know how I can impose homogeneous Neumann boundary conditions for Lagrangre multiplier, using the HDG method for the following problem:

           @U/@t = Laplace(U); in Omegax(0,T]
           U(x,y,0) = U_0;   in Omega
             U.n = 0 ;   on @Omega

For homogeneous neumann bc you don’t have to do anything, for time dependent problems have a look at the iTutorials:

And maybe you could give your topic a descriptive title