- Paulo Coelho (Wikipedia)
Paulo Coelho de Souza (/ˈkwɛl.juː, kuˈɛl.juː, -joʊ/ KWEL-yoo, koo-EL-yoo, -yoh, Portuguese: [ˈpawlu kuˈeʎu]; born 24 August 1947) is a Brazilian lyricist and novelist and a member of the Brazilian Academy of Letters since 2002. His novel The Alchemist became an international best-seller and he has published 30 more books since then.
- Von Neumann paradox (Wikipedia)
In mathematics, the von Neumann paradox, named after John von Neumann, is the idea that one can break a planar figure such as the unit square into sets of points and subject each set to an area-preserving affine transformation such that the result is two planar figures of the same size as the original. This was proved in 1929 by John von Neumann, assuming the axiom of choice. It is based on the earlier Banach–Tarski paradox, which is in turn based on the Hausdorff paradox.