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Mathematics
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Medo
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27
Let $A=(a_{ij})$ be an $n\times n$ matrix. Suppose that $A^2$ is diagonal. Must $A$ be diagonal?
8
Asymptotic behavior of a certain oscillatory integral
7
$L^p-L^q$ boundedness of this simple singular oscillatory integral operator
7
Changing variables in integration over spheres
6
Show that $e^{-t}\int_{0}^{t}\frac{e^{x}}{\sqrt{x}}dx$ is strictly decreasing for $t\geq1$