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Jul 1, 2022 at 19:05 comment added Math604 there is also a way of writing $ \Delta u - \nabla \gamma(x) \cdot \nabla u = f(x)$ in divergence form... or you can write an energy for this. Which might be helpful for certain things.
Jun 29, 2022 at 15:53 vote accept Student
Jun 29, 2022 at 11:14 answer added Giorgio Metafune timeline score: 3
Jun 29, 2022 at 8:38 comment added Student I am interested in the case when the domain is the whole space or a unit ball for instance.
Jun 29, 2022 at 8:37 history edited Student CC BY-SA 4.0
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Jun 28, 2022 at 16:58 comment added Giorgio Metafune If $\Omega$ is generic an explicit formula cannot be found, as for $\Delta$.
Jun 28, 2022 at 13:32 history edited Student CC BY-SA 4.0
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Jun 28, 2022 at 8:41 history asked Student CC BY-SA 4.0