From: wolf Date: Wed, 13 Apr 2005 15:38:57 +0000 (+0000) Subject: Add some docs. X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ecb51508aa3fe2a4b1511920ced335b940ffad42;p=dealii-svn.git Add some docs. git-svn-id: https://svn.dealii.org/trunk@10479 0785d39b-7218-0410-832d-ea1e28bc413d --- diff --git a/deal.II/deal.II/include/fe/fe_dgp.h b/deal.II/deal.II/include/fe/fe_dgp.h index b2ac891b53..6764496986 100644 --- a/deal.II/deal.II/include/fe/fe_dgp.h +++ b/deal.II/deal.II/include/fe/fe_dgp.h @@ -30,6 +30,20 @@ template class MappingQ; * polynomials form a Legendre basis on the unit square. Thus, the * mass matrix is diagonal, if the grid cells are parallelograms. * + * The shape functions of this element are composed of the Lagrange + * polynomials Li(x). In 2d, they form the basis + * Li(x) Lj(y) where + * i, with p the order of the finite + * element as given to the constructor. For example, for p=1, there + * are the finite element space on each cell is spanned by the three + * functions 1,x,y, although the actual shape functions may + * be linear combinations of these. Note that unlike the FE_DGQ + * element, the function xy is not part of the basis. + * + * Similarly, in 3d, the shape functions are Li(x) + * Lj(y) Lk(z) where + * i. + * * @author Guido Kanschat, 2001, 2002, Ralf Hartmann 2004 */ template