From: Wolfgang Bangerth Date: Mon, 18 Jul 2022 21:18:50 +0000 (-0600) Subject: Show a formula. X-Git-Tag: v9.5.0-rc1~1073^2 X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f7a697d3ffce0dc23c27fbd7f9c335564a12b332;p=dealii.git Show a formula. --- diff --git a/include/deal.II/base/symmetric_tensor.h b/include/deal.II/base/symmetric_tensor.h index bd6c92434f..d69798c9a6 100644 --- a/include/deal.II/base/symmetric_tensor.h +++ b/include/deal.II/base/symmetric_tensor.h @@ -37,6 +37,10 @@ class SymmetricTensor; /** * Return a unit symmetric tensor of rank 2, i.e., the * $\text{dim}\times\text{dim}$ identity matrix $\mathbf I$. + * For example, if `dim==2`, then this matrix has the form + * @f[ + * I_{2\times 2} = \begin{pmatrix} 1 & 0 \\ 0 & 1 \end{pmatrix}. + * @f] * * @relatesalso SymmetricTensor */