Further Results
If T is a compact operator, then it can be shown that any nonzero λ in the spectrum is an eigenvalue. In other words, the spectrum of such an operator, which was defined as a generalization of the concept of eigenvalues, consists in this case only of the usual eigenvalues, and possibly 0.
If X is a Hilbert space and T is a normal operator, then a remarkable result known as the spectral theorem gives an analogue of the diagonalisation theorem for normal finite-dimensional operators (Hermitian matrices, for example).
Read more about this topic: Spectrum (functional Analysis)
Famous quotes containing the word results:
“Intellectual despair results in neither weakness nor dreams, but in violence.... It is only a matter of knowing how to give vent to one’s rage; whether one only wants to wander like madmen around prisons, or whether one wants to overturn them.”
—Georges Bataille (1897–1962)
“We do not raise our children alone.... Our children are also raised by every peer, institution, and family with which they come in contact. Yet parents today expect to be blamed for whatever results occur with their children, and they expect to do their parenting alone.”
—Richard Louv (20th century)