SpECTRE  v2022.06.14
Ccz4::Tags::KMinusK0Minus2ThetaC< DataType > Struct Template Reference

The CCZ4 temporary expression $$K - K_0 - 2 \Theta c$$. More...

#include <TempTags.hpp>

## Public Types

using type = Scalar< DataType >

## Detailed Description

template<typename DataType>
struct Ccz4::Tags::KMinusK0Minus2ThetaC< DataType >

The CCZ4 temporary expression $$K - K_0 - 2 \Theta c$$.

### Details

Here, $$K$$ is the trace of the extrinsic curvature defined by gr::Tags::TraceExtrinsicCurvature, $$K_0$$ is the initial time derivative of the lapse, $$\Theta$$ is the projection of the Z4 four-vector along the normal direction, and $$c$$ controls whether to include algebraic source terms proportional to $$\Theta$$.

The documentation for this struct was generated from the following files:
• src/Evolution/Systems/Ccz4/TagsDeclarations.hpp
• src/Evolution/Systems/Ccz4/TempTags.hpp