Comments

• Symmetry boundary conditions (CactusBase/CartGrid3D) are implemented.

• Default behaviour is to apply so called flat boundary conditions to the calculated values of the constraint equations.

• Excision (Excision/LegoExcision) is included.

• The 3-metric is only included through the Macros in CactusEinstein/Einstein and as such the physical metric is used.

• Matter is included using the CalcTmuNu mechanism.

• The constraint calculation is default performed at the ANALYSIS time bin, if the constraint values are needed at every iteration, the parameter constraints_persist should be used to schedule the calculation instead at POSTSTEP.