Reference documentation for deal.II version 9.1.1

#include <deal.II/differentiation/ad/ad_helpers.h>
Public Types  
template<int rank, int dim, typename NumberType >  
using  type = Tensor< rank, dim, NumberType > 
An intermediate helper struct that defines the return type of Hessian (second derivative) calculations of scalar fields with respect to fields defined by the two extractortype template parameters. The first, ExtractorType_Row
, defines the field that the first derivatives are taken with respect to while the second, ExtractorType_Col
, defines the field that the second derivatives are taken with respect to.
Definition at line 2206 of file ad_helpers.h.
using Differentiation::AD::internal::HessianType< ExtractorType_Row, ExtractorType_Col >::type = Tensor<rank, dim, NumberType> 
The type associated with computing the gradient of a scalar field with respect to the given ExtractorType_Row
followed by the ExtractorType_Col
.
Definition at line 2220 of file ad_helpers.h.