# Retraction: Improved Approximation Schemes for Dominating Set Problems in Unit Disk Graphs

@article{Fakcharoenphol2021RetractionIA, title={Retraction: Improved Approximation Schemes for Dominating Set Problems in Unit Disk Graphs}, author={Jittat Fakcharoenphol and Pattara Sukprasert}, journal={ArXiv}, year={2021}, volume={abs/2109.01283} }

Retraction note: After posting the manuscript on arXiv, we were informed by Erik Jan van Leeuwen that both results were known and they appeared in his thesis [vL09]. A PTAS for MDS is at Theorem 6.3.21 on page 79 and A PTAS for MCDS is at Theorem 6.3.31 on page 82. The techniques used are very similar. He noted that the idea for dealing with the connected version using a constant number of extra layers in the shifting technique not only appeared Zhang et al [ZGWD09] but also in his 2005 paper… Expand

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