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multi-index_power [2013/09/17 00:24] nikolaj |
multi-index_power [2013/09/17 00:24] nikolaj |
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| is taken to be a multiindex, then $|\gamma|=6$ and we write | is taken to be a multiindex, then $|\gamma|=6$ and we write | ||
| - | $f^{(\gamma)}(x) \equiv \frac{\partial^{|\gamma|}}{\partial x\gamma} f \equiv \frac{\partial^3}{\partial x_1^3} \frac{\partial}{\partial x_2} \frac{\partial^2}{\partial x_5^2} f $ | + | $f^{(\gamma)}(x) \equiv \frac{\partial^{|\gamma|}}{\partial x^\gamma} f \equiv \frac{\partial^3}{\partial x_1^3} \frac{\partial}{\partial x_2} \frac{\partial^2}{\partial x_5^2} f $ |
| === Reference === | === Reference === | ||
