Abstract
It is well known that routine methods of computing the spectrum of a self-adjoint operator often lead to spurious eigenvalues in a gap between two parts of the essential spectrum. We provide a geometrical explanation for a numerical method of resolving this problem, and give some examples of its use.
| Original language | English |
|---|---|
| Pages (from-to) | 417 - 438 |
| Number of pages | 22 |
| Journal | IMA JOURNAL OF NUMERICAL ANALYSIS |
| Volume | 24 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - Jul 2004 |