void \
DerivativeApproximation:: \
approximate_derivative_tensor<deal_II_dimension> \
+(const Mapping<deal_II_dimension> & mapping, \
+ const DH<deal_II_dimension> &dof_handler, \
+ const InputVector &solution, \
+ const DH<deal_II_dimension>::active_cell_iterator &cell,\
+ Tensor<1,deal_II_dimension> &derivative, \
+ const unsigned int component); \
+ \
+template \
+void \
+DerivativeApproximation:: \
+approximate_derivative_tensor<deal_II_dimension> \
+(const Mapping<deal_II_dimension> & mapping, \
+ const DH<deal_II_dimension> &dof_handler, \
+ const InputVector &solution, \
+ const DH<deal_II_dimension>::active_cell_iterator &cell,\
+ Tensor<2,deal_II_dimension> &derivative, \
+ const unsigned int component); \
+ \
+template \
+void \
+DerivativeApproximation:: \
+approximate_derivative_tensor<deal_II_dimension> \
+(const Mapping<deal_II_dimension> & mapping, \
+ const DH<deal_II_dimension> &dof_handler, \
+ const InputVector &solution, \
+ const DH<deal_II_dimension>::active_cell_iterator &cell,\
+ Tensor<3,deal_II_dimension> &derivative, \
+ const unsigned int component); \
+ \
+template \
+void \
+DerivativeApproximation:: \
+approximate_derivative_tensor<deal_II_dimension> \
(const DH<deal_II_dimension> &dof_handler, \
const InputVector &solution, \
const DH<deal_II_dimension>::active_cell_iterator &cell,\