and 
are both solutions, then so is any linear combination of the form 
where 
and 
are constants. [P5.6]
of: an equation (such as the wave equation, the time-dependent Schrödinger equation, or a general linear homogeneous differential equation)
is: a property whereby if and are both solutions, then so is any linear combination of the form where and are constants. [P5.6]
Copyright 1997, The Open University