Occasionally, some variables that are not evolved need to have three timelevels for prolongation purposes. They should then be registered as constrained variables with MoL. Should Kranc take care of this?
Notice that the variables do not need to be the thorn's own. As an example, a scalar-field thorn which adds to Tmunu needs to register the TmunuBase::stressenergy* variables as constrained with MoL.
Occasionally, some variables that are not evolved need to have three timelevels for prolongation purposes. They should then be registered as constrained variables with MoL. Should Kranc take care of this?
Notice that the variables do not need to be the thorn's own. As an example, a scalar-field thorn which adds to Tmunu needs to register the TmunuBase::stressenergy* variables as constrained with MoL.