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There are different approaches how to handle the source term that appears in the right hand side of Poisson's equation in the EEG forward problem. For different FEM discretizations, different methods have been suggested. An overview of currently supported source models for each supported FEM can be found [here](https://arxiv.org/abs/1901.02874).
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When solving the EEG/MEG forward problems using DUNEuro, the source model parameters are passed in a nested configuration structure **source_model** when applying the transfer matrix or solving directly.
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An overview of the different parameters is given below.
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# CG
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## partial integration
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name in config: `partial_integration`
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