Abstract
We state and prove an extended version of a theorem of Titchmarsh-Neumark-Walter concerning absolutely continuous operators. Our proof is different, in fact, first we state a set of abstract criteria for absolute continuity. Then we illustrate how the JWKB-approximation method can be applied to verify this set of abstract criteria. This verification depends on detailed estimates that we shall prove in the second half of this paper.
Original language | English (US) |
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Pages (from-to) | 49-56 |
Number of pages | 8 |
Journal | Letters in Mathematical Physics |
Volume | 1 |
Issue number | 1 |
DOIs | |
State | Published - Dec 1975 |