Timeline for Does have Mathematica a built-in function for write Dirac delta in spherical coordinate?
Current License: CC BY-SA 4.0
21 events
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| Feb 17, 2022 at 8:53 | comment | added | Ulrich Neumann | @Wisdom Hope it helps! | |
| Feb 17, 2022 at 8:53 | comment | added | Wisdom | @UlrichNeumann many thanks. I'll check it out. it. god bless you. | |
| Feb 17, 2022 at 8:51 | comment | added | Ulrich Neumann | @Wisdom See Weisstein Mathworld Deltafunction, especially equation (2). | |
| Feb 17, 2022 at 8:26 | vote | accept | Wisdom | ||
| Feb 17, 2022 at 8:26 | comment | added | Wisdom |
@UlrichNeumann Thank you so much. you helped me a lot. Can you give me a reference for your two last paragraphs? I mean it must be ... and knowing... because I'm not an expert in Mathematics and don't know these points. Thanks again.
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| Feb 17, 2022 at 7:51 | comment | added | Ulrich Neumann | @Wisdom Look at my modified answer. | |
| Feb 17, 2022 at 7:49 | history | edited | Ulrich Neumann | CC BY-SA 4.0 |
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| Feb 16, 2022 at 19:16 | comment | added | Wisdom | Because I didn't know how to write vectors inside dirac delta in my code! | |
| Feb 16, 2022 at 19:14 | comment | added | Ulrich Neumann |
@Wisdom but your code ` Integrate[...,{re,0,Infinity},{rp,0,Infinity}]` uses scalars re,rp???
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| Feb 16, 2022 at 19:08 | comment | added | Wisdom | @UlrichNeumann thanks but the Dirac delta inside my integral includes vectors of $r_e$ and $r_p$ not scalar ones! I had written this point in the addendum. For this reason I was looking for a way to write dirac delta in spherical coordinates. | |
| Feb 16, 2022 at 19:01 | comment | added | Ulrich Neumann | @Wisdom You're welcome! See my modified answer, hope it's what you're looking for. | |
| Feb 16, 2022 at 19:00 | history | edited | Ulrich Neumann | CC BY-SA 4.0 |
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| Feb 16, 2022 at 18:53 | comment | added | Wisdom |
@UlrichNeumann Yes, it appears one time inside the ep integral. Many thanks
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| Feb 16, 2022 at 18:51 | comment | added | Ulrich Neumann |
@Wisdom Only the integral contains a DiracDelta ? I'll modify my answer
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| Feb 16, 2022 at 18:16 | comment | added | Wisdom | @UlrichNeumann Thanks please see the addendum. | |
| Feb 16, 2022 at 18:01 | comment | added | Ulrich Neumann |
@Wisdom That would be helpful. In my formula I named the sphere coordinates r, \[Phi], \[Theta] and fixed point r0, \[Phi]0, \[Theta]0. But I would only expect the differentials dr d\[Phi] d\[Theta].
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| Feb 16, 2022 at 17:54 | comment | added | Wisdom | @UlrichNeumann Thanks a lot but I didn't understand how it works for my integral?! I have $r_1$ and $r_2$, can explain more or it is better to I add my explicit forms of my integrals in the question? | |
| Feb 16, 2022 at 17:48 | comment | added | Ulrich Neumann | Perhaps: Sphere with radius ->Infinity | |
| Feb 16, 2022 at 14:53 | comment | added | user64494 | Can you give the definition of "the infinite sphere "? I have never met it. TIA. | |
| Feb 16, 2022 at 13:33 | history | edited | Ulrich Neumann | CC BY-SA 4.0 |
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| Feb 16, 2022 at 13:19 | history | answered | Ulrich Neumann | CC BY-SA 4.0 |