2018-11-29 10:49:13 +0100 | asked a question | How to use the divergence of a finite function as the source term of another problem I use RT element to solve problem A and denote the finite element solution by sigma, sigma is a matrix-valued finite element function. I need to use the divergence of sigma to be the source term of another problem, the trial function space is vector-valued functions. But it doesn't work. The code is |

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