most recent 30 from http://mathoverflow.net 2013-05-22T05:31:12Z http://mathoverflow.net/feeds/question/119285 http://www.creativecommons.org/licenses/by-nc/2.5/rdf http://mathoverflow.net/questions/119285/cohomology-of-lie-groups-and-lie-algebras unknown (google) 2013-01-18T18:53:47Z 2013-01-18T18:53:47Z

<p>If the second cohomology of a Lie algerba $g$ is $H^2(g,Z)=Z$. Then what is the second cohomology of the direct product of $n$ copies of $g$? Is it $Z^n$? Can I think if this cohomology as an integral lattice? Thanks.</p>