Ekert, A.PHYSICS2014-10-162014-10-162008-08Ekert, A. (2008-08). Complex and unpredictable Cardano. International Journal of Theoretical Physics 47 (8) : 2101-2119. ScholarBank@NUS Repository. https://doi.org/10.1007/s10773-008-9775-100207748https://scholarbank.nus.edu.sg/handle/10635/96040This purely recreational paper is about one of the most colorful characters of the Italian Renaissance, Girolamo Cardano, and the discovery of two basic ingredients of quantum theory, probability and complex numbers. © 2008 Springer Science+Business Media, LLC.Article000257867300001