The derivative with respect to Bondi retarded time \(u\). More...

#include <Tags.hpp>

Public Types
using	type = Scalar<SpinWeighted<ComplexDataVector, Tag::type::type::spin>>
using	tag = Tag

Detailed Description

template<typename Tag>
struct Cce::Tags::Du< Tag >

The derivative with respect to Bondi retarded time \(u\).

Note: The worldtube boundary tag Du<Dr<BondiJ>> is the time derivative following the worldtube (at constant numerical coordinate \(\breve y = -1\)), i.e. \(\partial_{\breve u}\partial_r J = \frac{d}{d u}(\partial_r J)\), not a derivative at constant Bondi \(r\). See BondiWorldtubeDataManager::populate_boundary_du_dr_j and the fixed- \(y\) vs. fixed- \(r\) notes in BoundaryData.hpp.

The documentation for this struct was generated from the following file:

Public Types