User klein - MathOverflow most recent 30 from http://mathoverflow.net 2013-05-20T21:34:28Z http://mathoverflow.net/feeds/user/8671 http://www.creativecommons.org/licenses/by-nc/2.5/rdf http://mathoverflow.net/questions/37988/submersion-between-s2n1-and-mathbbcpn Submersion between $S^{2n+1}$ and $\mathbb{C}P^n$ Klein 2010-09-07T16:30:34Z 2010-09-07T16:30:34Z <p>How construct a submersion $\Lambda:S^{2n+1}\to\mathbb{C}P^n$ such that for every $x\in\mathbb{C}P^n$ , the fiber $\Lambda^{−1}(x)$ is diffeomorphic to the circle $S^1$ ?</p> http://mathoverflow.net/questions/36891/differential-forms-pdes-and-lie-cartan Differential forms, PDE's and Élie Cartan Klein 2010-08-27T15:52:10Z 2010-08-28T04:51:54Z <p>Hello everybody, I would like to know about the work of Élie Cartan of PDE's that relate to the theory of foliations and differential forms.</p> <p>I am interested in the subject and will be happy to receive basic references on the subject (articles) as well as explanations on the importance of the subject in mathematics today.</p> http://mathoverflow.net/questions/127391/an-example-of-a-differentiable-manifold-which-is-of-class-ck-but-not-of-clas Comment by Klein Klein 2013-04-12T18:19:43Z 2013-04-12T18:19:43Z <a href="http://math.stackexchange.com/questions/358760/an-example-of-a-differentiable-manifold-class-ck-but-not-class-ck-1" rel="nofollow" title="an example of a differentiable manifold class ck but not class ck 1">math.stackexchange.com/questions/358760/&hellip;</a> http://mathoverflow.net/questions/127391/an-example-of-a-differentiable-manifold-which-is-of-class-ck-but-not-of-clas Comment by Klein Klein 2013-04-12T18:15:31Z 2013-04-12T18:15:31Z As the noted author of the comment, the comment was not very enlightening for me, I am looking for a concrete example. http://mathoverflow.net/questions/118753/examples-in-ergodic-theory-and-topological-dynamics Comment by Klein Klein 2013-01-12T21:08:02Z 2013-01-12T21:08:02Z Good question. I'd like to meet some interesting examples too. I believe that Juan does not necessarily want a list of examples, but examples of knowing one's personal preference. http://mathoverflow.net/questions/36891/differential-forms-pdes-and-lie-cartan/36931#36931 Comment by Klein Klein 2010-08-28T01:48:01Z 2010-08-28T01:48:01Z thanks Palais and Wong! http://mathoverflow.net/questions/36891/differential-forms-pdes-and-lie-cartan Comment by Klein Klein 2010-08-27T18:43:34Z 2010-08-27T18:43:34Z Thanks Wong, Yang and Figueroa! It is a good start for my bibliographic research