1 Retraction note
The Editors-in-Chief have retracted this article [1] because it overlaps significantly with a number of previously published articles from different authors [2–4] and one article by different authors that was simultaneously under consideration with another journal [5]. The article also showed evidence of peer review manipulation. Additionally, the identity of the corresponding author could not be verified: Roskilde University have confirmed that Beatriz Ychussie has not been affiliated with their institution. The authors have not responded to any correspondence with regards to this retraction.
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Xue, G.: Rarefied sets at infinity associated with the Schrödinger operator. J. Inequal. Appl. 2014, 247 (2014). https://doi.org/10.1186/1029-242X-2014-247
Zhao, T., Yamada, A.: Growth properties of Green–Sch potentials at infinity. Bound. Value Probl. 2014, 245 (2014). https://doi.org/10.1186/s13661-014-0245-9
Zhao, T.: Minimally thin sets associated with the stationary Schrödinger operator. J. Inequal. Appl. 2014, 67 (2014). https://doi.org/10.1186/1029-242X-2014-67
Xue, G., Yuzbasi, E.: Fixed point theorems for solutions of the stationary Schrödinger equation on cones. Fixed Point Theory Appl. 2015, 34 (2015). https://doi.org/10.1186/s13663-015-0275-8
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Li, Z., Ychussie, B. Retraction Note: Sharp geometrical properties of a-rarefied sets via fixed point index for the Schrödinger operator equations. Fixed Point Theory Appl 2020, 2 (2020). https://doi.org/10.1186/s13663-020-0671-6
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DOI: https://doi.org/10.1186/s13663-020-0671-6