From: wolf Date: Wed, 1 Jun 2005 00:26:08 +0000 (+0000) Subject: Augment documentation. X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=23792aaf52e569743c201320d585d5ebe79f8494;p=dealii-svn.git Augment documentation. git-svn-id: https://svn.dealii.org/trunk@10800 0785d39b-7218-0410-832d-ea1e28bc413d --- diff --git a/deal.II/base/include/base/symmetric_tensor.h b/deal.II/base/include/base/symmetric_tensor.h index d2dc48d252..f8848cc075 100644 --- a/deal.II/base/include/base/symmetric_tensor.h +++ b/deal.II/base/include/base/symmetric_tensor.h @@ -2129,6 +2129,12 @@ identity_tensor () * Return the tensor of rank 4 that is the outer product of the two tensors * given as arguments, i.e. the result T=t1 \otimes t2 satisfies * T phi = t1 (t2 : phi) for all symmetric tensors phi. + * + * For example, the deviator tensor can be computed as + * identity_tensor() - + * 1/d*outer_product(unit_symmetric_tensor(), + * unit_symmetric_tensor()), since the (double) contraction with the + * unit tensor yields the trace of a symmetric tensor. * * @relates SymmetricTensor * @author Wolfgang Bangerth, 2005