most recent 30 from http://mathoverflow.net 2013-05-21T18:41:53Z http://mathoverflow.net/feeds/question/99503 http://www.creativecommons.org/licenses/by-nc/2.5/rdf http://mathoverflow.net/questions/99503/semiclassical-wavefront-set Laurel 2012-06-13T20:49:26Z 2012-06-13T20:49:26Z

<p>Suppose that $a\in C^{\infty}_{c}(\mathbb{R}^n)$ and $\phi\in C^{\infty}(\mathbb{R}^n)$ are real-valued. How would I show that</p> <p>$WF_{h}(ae^{\frac{i}{h}\phi})=\{(x,\partial_{x}\phi)|x\in$ supp$(a)\}$ ?</p>