void unit_normal_one_form(gsl::not_null< tnsr::i< DataVector, 3, Frame > * > result, const tnsr::i< DataVector, 3, Frame > &normal_one_form, const DataVector &one_over_one_form_magnitude)
Computes normalized unit normal one-form to a Strahlkorper.
Tags::EvolvedFieldsFromCharacteristicFields< DataVector, Dim, Frame >::type evolved_fields_from_characteristic_fields(const Scalar< DataVector > &gamma_2, const tnsr::aa< DataVector, Dim, Frame > &u_psi, const tnsr::iaa< DataVector, Dim, Frame > &u_zero, const tnsr::aa< DataVector, Dim, Frame > &u_plus, const tnsr::aa< DataVector, Dim, Frame > &u_minus, const tnsr::i< DataVector, Dim, Frame > &unit_normal_one_form)
For expressions used here to compute evolved fields from characteristic ones, see CharacteristicField...