But also first-order perturbation theory for degenerate states leads to a matrix eigenvalue problem.
After a star has finished generating energy through thermonuclear fusion, it evolves into a more compact, degenerate state.
Corresponding to each eigenvalue there are a finite number of degenerate states.
Persius's satire deals with the degenerate state of contemporary literature.
It seems to have had an unusual amount to start with, of course, but the rotational speed is chiefly a result of its degenerate state.
Even in the darkness of the inner passage he could see its degenerate state.
From the perspective of quantum statistical mechanics, several degenerate states at the same level are all equally probable of being filled.
The eigenvalue of an operator which distinguishes between degenerate states is called a quantum number.
The next figure shows examples of the Stokes parameters in degenerate states.