
#1
Feb412, 09:57 AM

P: 1

Hi. I have some problem in finding the gradient of this norm
[itex]\sum_{l = 1}^{n} \left ( (\nabla_{x} u)^{2}_{l} + (\nabla_{y} u)^{2}_{l} \right )^{1/2}[/itex] I have some results to it but I'm not sure about it. Can you give me some insights for this. Thanks. 


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