We show that for "most" compact nonmetrizable spaces, the unit ball of the Banach space C(K) contains an uncountable 2-equilateral set. We also give examples of compact nonmetrizable spaces K such that the minimum cardinality of a maximal equilateral set in C(K) is countable.
@article{bwmeta1.element.bwnjournal-article-doi-10_4064-sm8259-1-2016, author = {Sophocles K. Mercourakis and Georgios Vassiliadis}, title = {Equilateral sets in Banach spaces of the form C(K)}, journal = {Studia Mathematica}, volume = {231}, year = {2015}, pages = {241-255}, zbl = {06575015}, language = {en}, url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-sm8259-1-2016} }
Sophocles K. Mercourakis; Georgios Vassiliadis. Equilateral sets in Banach spaces of the form C(K). Studia Mathematica, Tome 231 (2015) pp. 241-255. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-sm8259-1-2016/