It is shown that a Sidon set cannot have an integer cluster point in the Bohr topology.
@article{bwmeta1.element.bwnjournal-article-doi-10_4064-cm133-2-3, author = {Benjamin Wells}, title = {Sidon sets and Bohr cluster points}, journal = {Colloquium Mathematicae}, volume = {131}, year = {2013}, pages = {175-177}, zbl = {1286.43007}, language = {en}, url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-cm133-2-3} }
Benjamin Wells. Sidon sets and Bohr cluster points. Colloquium Mathematicae, Tome 131 (2013) pp. 175-177. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-cm133-2-3/