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Boundary conditions for COMPLEX or VECTOR VARIABLES may be declared for the complex or vector variable directly, or for the individual components.

If C is a COMPLEX VARIABLE with components Cr and Ci, the following boundary condition declarations are equivalent:

VALUE(C) = Complex(a,b)

VALUE(Cr) = a VALUE(Ci) = b

If V is a VECTOR VARIABLE with components Vx and Vy, the following boundary condition declarations are equivalent:

NATURAL(V) = Vector(a,b)

NATURAL(Vx) = a NATURAL(Vy) = b

The component form allows the application of different boundary condition forms (VALUE or NATURAL) to the components, while the root variable form does not.