SUFFICIENT CONDITIONS FOR THE EXISTENCE OF LIMITING CARLEMAN WEIGHTS
Forum of Mathematics, Sigma, Tome 5 (2017)
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In Angulo-Ardoy et al. [Anal. PDE, 9(3) (2016), 575–596], we found some necessary conditions for a Riemannian manifold to admit a local limiting Carleman weight (LCW), based on the Cotton–York tensor in dimension 3 and the Weyl tensor in dimension 4. In this paper, we find further necessary conditions for the existence of local LCWs that are often sufficient. For a manifold of dimension 3 or 4, we classify the possible Cotton–York, or Weyl tensors, and provide a mechanism to find out whether the manifold admits local LCW for each type of tensor. In particular, we show that a product of two surfaces admits an LCW if and only if at least one of the two surfaces is of revolution. This provides an example of a manifold satisfying the eigenflag condition of Angulo-Ardoy et al. [Anal. PDE, 9(3) (2016), 575–596] but not admitting LCW.
@article{10_1017_fms_2017_4,
author = {PABLO ANGULO-ARDOY and DANIEL FARACO and LUIS GUIJARRO},
title = {SUFFICIENT {CONDITIONS} {FOR} {THE} {EXISTENCE} {OF} {LIMITING} {CARLEMAN} {WEIGHTS}},
journal = {Forum of Mathematics, Sigma},
publisher = {mathdoc},
volume = {5},
year = {2017},
doi = {10.1017/fms.2017.4},
language = {en},
url = {http://geodesic.mathdoc.fr/articles/10.1017/fms.2017.4/}
}
TY - JOUR AU - PABLO ANGULO-ARDOY AU - DANIEL FARACO AU - LUIS GUIJARRO TI - SUFFICIENT CONDITIONS FOR THE EXISTENCE OF LIMITING CARLEMAN WEIGHTS JO - Forum of Mathematics, Sigma PY - 2017 VL - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.1017/fms.2017.4/ DO - 10.1017/fms.2017.4 LA - en ID - 10_1017_fms_2017_4 ER -
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PABLO ANGULO-ARDOY; DANIEL FARACO; LUIS GUIJARRO. SUFFICIENT CONDITIONS FOR THE EXISTENCE OF LIMITING CARLEMAN WEIGHTS. Forum of Mathematics, Sigma, Tome 5 (2017). doi: 10.1017/fms.2017.4
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