Modal Analysis and Associated Equations

When modal analysis is desired, it must be declared in the SELECT section with the selector

MODES = integer

where integer is the number of modes to be analyzed.

The equation should then be written in the form

F(V) +LAMBDA*G(V) = H(X,Y)

Where F(V) and G(V) are the appropriate terms containing the dependent variable, and H(X,Y) is a driving source term.  

The name LAMBDA is automatically declared by FlexPDE to mean the eigenvalue, and should not be declared in the DEFINITIONS section.