It doesn't allocate any memory. Allocate ArithFab for given box and number of components. Creates aliasing ArithFab that uses memory in BaseFab bf. See aliasing constructor for BaseFab. Fill with a pattern of numbers.
All components are copied and multiplied by corresponding multiplier.
Copies with a reversal. Comp is the component copied. Most general version, specify subbox and which components. As above except on entire domain. As above except on entire domain, all components.