From: guido Date: Tue, 31 May 2005 16:36:20 +0000 (+0000) Subject: documentation improved X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0362830bd7ef9757b268cf8386593b2ec07d3898;p=dealii-svn.git documentation improved git-svn-id: https://svn.dealii.org/trunk@10793 0785d39b-7218-0410-832d-ea1e28bc413d --- diff --git a/deal.II/deal.II/include/fe/fe_raviart_thomas.h b/deal.II/deal.II/include/fe/fe_raviart_thomas.h index 80949d6d15..1ab8f1d4a7 100644 --- a/deal.II/deal.II/include/fe/fe_raviart_thomas.h +++ b/deal.II/deal.II/include/fe/fe_raviart_thomas.h @@ -558,22 +558,30 @@ class FE_RaviartThomas : public FiniteElement * * For this Raviart-Thomas element, the node values are not cell and * face moments with respect to certain polynomials, but the values in - * quadrature points. + * quadrature points. Following the general scheme for numbering + * degrees of freedom, the node values on edges are first, edge by + * edge, according to the natural ordering of the edges of a cell. The + * interior degrees of freedom are last. * * For an RT-element of degree k, we choose - * (k+1)d-1 Gauss points on each face. This way, the - * normal component which is in Qk is uniquely - * determined. Furthermore, since this Gauss-formula is exact on - * Q2k+1, these node values correspond to the exact - * integration of the moments of the RT-space. + * (k+1)d-1 Gauss points on each face. These points + * are ordered lexicographically with respect to the orientation of + * the face. This way, the normal component which is in + * Qk is uniquely determined. Furthermore, since + * this Gauss-formula is exact on Q2k+1, these node + * values correspond to the exact integration of the moments of the + * RT-space. * * In the interior of the cells, the moments are with respect to an * anisotropic Qk space, where the test functions * are one degree lower in the direction corresponding to the vector - * component under consideration. This can be emulated by using an + * component under consideration. This is emulated by using an * anisotropic Gauss formula for integration. * - * @warning The degree stored in the member variable + * @warning The current implementation is for Cartesian meshes + * only. You must use MappingCartesian. + * + * @note The degree stored in the member variable * FiniteElementData::degree is higher by one than the * constructor argument! *