SpECTRE  v2026.04.01
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Xcts::BoundaryConditions::ApparentHorizon< ConformalGeometry >::NegativeExpansion Struct Reference

Public Types

using type

Static Public Attributes

static constexpr Options::String help

Member Typedef Documentation

◆ type

template<Xcts::Geometry ConformalGeometry>
using Xcts::BoundaryConditions::ApparentHorizon< ConformalGeometry >::NegativeExpansion::type
Initial value:
A class indicating that a parsed value can be automatically computed instead of specified.
Definition Auto.hpp:44
'None' label
Definition Auto.hpp:26

Member Data Documentation

◆ help

template<Xcts::Geometry ConformalGeometry>
Options::String Xcts::BoundaryConditions::ApparentHorizon< ConformalGeometry >::NegativeExpansion::help
staticconstexpr
Initial value:
=
"Specify an analytic solution to impose its expansion at the excision "
"surface. The analytic solution will be evaluated at coordinates "
"centered at the apparent horizon. "
"If the excision surface lies within the solution's "
"apparent horizon, the imposed expansion will be negative and thus the "
"excision surface will lie within an apparent horizon. Alternatively, "
"set this option to 'None' to impose the expansion is zero at the "
"excision surface, meaning the excision surface _is_ an apparent "
"horizon."

The documentation for this struct was generated from the following file:
  • src/Elliptic/Systems/Xcts/BoundaryConditions/ApparentHorizon.hpp