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Dec 10, 2016 at 17:33 vote accept Ruslan
Jan 6, 2015 at 18:58 comment added Christian Remling Or the embedded eigenvalues could be dense, even for a potential that almost (but not quite) decays as $O(1/x)$ (first example is due to Naboko 1986). Or there could be dense pure point spectrum, with decay $O(x^{-1/2+\epsilon})$ of the potential.
Jan 6, 2015 at 17:40 history edited Robert Israel CC BY-SA 3.0
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Jan 6, 2015 at 16:42 history answered Robert Israel CC BY-SA 3.0