conatus.expert.EVP

class conatus.expert.EVP(variables, eigenvalue, *, name=None, symmetry=None, namespace=None)

Bases: Problem

Generalized eigenvalue problem L X = -sigma M X written with sigma in the LHS; RHS = 0.

Parameters:

• variables (Iterable[Field])

• eigenvalue (Parameter)

• name (str | None)

• symmetry (SymmetrySubspace | None)

• namespace (Any)

kind = 'EVP'

check()

Refuse an EVP whose eigenvalue appears in no equation (M = 0, no spectrum at all).

Return type:

None