Lukic's decomposition conjecture for higher-order Szegő sum rules
Let be the density of the absolutely continuous part of a measure on the unit circle, let be its Verblunsky-coefficient sequence, and let be the left shift operator, . For distinct and strictly positive integers , let . Lukic's conjecture. The finiteness condition
is equivalent to the existence of sequences such that
with
and
for every . This refinement replaces the false pair of global conditions in Simon's conjecture and is presented as an improved conjecture.
References
Primary source
Zhihua Du, “Sum rules and Simon spectral gem problem on higher order Szegő theorems”, arXiv:2312.01323 (2023).
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