Similarly, Aristocracy may degenerate into Oligarchy and needs analogous checks. Let denote the subspace spanned by these degenerate eigenstates. First-order perturbation theory also leads to matrix eigenvalue problem for degenerate states. It would seem that these people will later degenerate to become the Morlocks. The splitting of degenerate energies formula 43 is generally observed. Equivalently again, both sheets of the focal surface degenerate to conics. The disease causes cells in the retina to degenerate and die. Therefore, distal nerve fibers do not degenerate and the myelin damage can be repaired. All cells within the blood clot degenerate and die. Particle exchange then corresponds to a linear transformation on this subspace of degenerate states. Inversely, sometimes collapsed frontal systems will degenerate into troughs. The Stark effect can lead to splitting of degenerate energy levels. Studying situations like this requires a theory capable of assigning extra data to degenerate situations. They also often contain cysts that can degenerate or rupture. Therefore, formula 1 has at least one pair of degenerate energy eigenkets.