most recent 30 from http://mathoverflow.net 2013-05-26T00:30:57Z http://mathoverflow.net/feeds/question/77039 http://www.creativecommons.org/licenses/by-nc/2.5/rdf http://mathoverflow.net/questions/77039/cyclotomic-fields-and-singular-moduli Adam Harris 2011-10-03T13:27:19Z 2011-10-03T20:24:03Z

<p>Let $\mu$ be the roots of unity and $S$ be the image under the modular $j$-function of all imaginary quadratic $\tau$. Then what is $\mathbb{Q}(\mu)\cap\mathbb{Q}(S)$?</p>