Dear deal II users, Is there a way to access higher than second order derivatives of discontinuous shape functions?
I saw in the documentation that FEValuesBase can provide 1st and 2nd order derivatives. If there is another class or a tutorial I haven't found where this is demonstrated, please let me know. Why this: The problem I am interested in is wave propagation and I read in a paper that the accuracy of DG methods can be higher than the one of spectral methods if the polynomial degree of the DG method is higher than the order the time stepping scheme in the spectral method. However, the DG method requires higher derivatives.. Any help is appreciated. Regards, Tom
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