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Minor improvement to the documentation of FE_PolyTensor. #13889

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Jun 15, 2022
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Minor improvement to the documentation of FE_PolyTensor. #13889

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6 changes: 4 additions & 2 deletions include/deal.II/fe/fe_poly_tensor.h
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Original file line number Diff line number Diff line change
Expand Up @@ -519,15 +519,17 @@ class FE_PolyTensor : public FiniteElement<dim, spacedim>
const std::unique_ptr<const TensorPolynomialsBase<dim>> poly_space;

/**
* The inverse of the matrix <i>a<sub>ij</sub></i> of node values
* The inverse of the matrix <i>a<sub>ij</sub></i> of node functionals
* <i>N<sub>i</sub></i> applied to polynomial <i>p<sub>j</sub></i>. This
* matrix is used to convert polynomials in the "raw" basis provided in
* #poly_space to the basis dual to the node functionals on the reference
* cell.
*
* This object is not filled by FE_PolyTensor, but is a chance for a derived
* class to allow for reorganization of the basis functions. If it is left
* empty, the basis in #poly_space is used.
* empty, the basis in #poly_space is used, i.e., it is assumed that
* #poly_space already satisfies the Kronecker delta property with
* regard to the node functionals.
*/
FullMatrix<double> inverse_node_matrix;

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