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Post AuFyIiKP5NLi191q9Q by [email protected] |
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Post #AuFoICBJbggqm6tLjU by [email protected] |
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Vector calculus gets fairly deep - I'm talking about the usual stuff with d… |
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Post #AuFpqxd3nwNtjN0iLg by [email protected] |
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@johncarlosbaez funny, I just had tabs open in my browser regarding conservatio… |
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Post #AuFpyuKfwdbtp7CUdc by [email protected] |
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@johncarlosbaez Sidney Coleman, when teaching quantum field theory, used to tal… |
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Post #AuFr8xrllFINdK2Utc by [email protected] |
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@baptnz - I have no idea what Lipkin's 'zilch', dual-symmetric med… |
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Post #AuFrn33NtU87IxaMVM by [email protected] |
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@johncarlosbaez My office neighbour often starts a conversation with statements… |
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Post #AuFwA1Z9zRoVAVexSS by [email protected] |
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@johncarlosbaez I still have to find a proof convincing to myself that a magnet… |
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Post #AuFwA1fBd2dNTCTlqq by [email protected] |
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@martinvermeer - it's extremely similar. I was planning to write a blog ar… |
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Post #AuFwN7yPTmUGnxiaY4 by [email protected] |
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@johncarlosbaez I immediately thought of Emmy Noether's theorem. Is there a… |
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Post #AuFyIiKP5NLi191q9Q by [email protected] |
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@johncarlosbaez you're such an inspiration of taking simple things and digg… |
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Post #AuG17SAP8GiwZTfphY by [email protected] |
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@not2b @johncarlosbaez Pretty sure all conserved quantities have a symmetry. Th… |
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Post #AuG17SICfGxixfK3rE by [email protected] |
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@skewray @not2b - it's an interesting question. Noether's theorem says… |
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Post #AuG2BOQN5YVw4oaJ96 by [email protected] |
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Give up on that challenge? Here's how it goes. We're trying to proved… |
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Post #AuG47KUjxMLkdhonKa by [email protected] |
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@johncarlosbaez I often wonder if things might get clearer/easier when using in… |
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Post #AuG652GowYutRjLEHY by [email protected] |
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@baptnz - a bunch of vector calculus identities are easiest for me to check usi… |
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Post #AuGDghuHnnAEyPiAF6 by [email protected] |
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@johncarlosbaez @skewray @not2b In my opinion the deeper point is that vorticit… |
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Post #AuGOrnVGQyML0mUxFY by [email protected] |
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@NickPizzoOceans @skewray @not2b - Cool! I don't know what vorticity conse… |
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Post #AuGP9k6xmfFJhiglOa by [email protected] |
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@NickPizzoOceans @johncarlosbaez @not2b I can sort of believe that, but it make… |
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Post #AuGP9kDhNcdM2bq8tU by [email protected] |
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@skewray wrote: "it makes me wonder why vorticity is considered something … |
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Post #AuGPCI7oIDnvm6IfeS by [email protected] |
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@adityakhanna - thanks! |
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Post #AuGWyQMve3CWvDGpGa by [email protected] |
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@jaztrophysicist -thanks! I'm just a raw beginner in fluids or MHD, but it… |
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Post #AuGYAJxrNjh0UKmVKi by [email protected] |
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@johncarlosbaez @skewray @not2b It means that there are three invariants of mot… |
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Post #AuHOGlPJSTgOxF11Qe by [email protected] |
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@baptnz @johncarlosbaez For me, conceptually v ⋅ ∇ is the easiest of the te… |
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Post #AuHOGlWl0ndbKKUy24 by [email protected] |
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@pschwahn - that's a nice exegesis, but I have to add that in Euler's e… |
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Post #AuHPcMig1jouiCwAgy by [email protected] |
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@johncarlosbaez @pschwahn Indeed, when I teach E&M I often feel we're b… |
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Post #AuHUJk1ldzzvGjo000 by [email protected] |
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@johncarlosbaez In my time, I had to do a lot of vector calculus so I learned a… |
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Post #AuHhzNZWp24nBumWJ6 by [email protected] |
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@BartoszMilewski - yes, I always remember εⁱʲᵏεₖₗₘ = δⁱₖδʲ�… |
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Post #AuHjiEi6iSOih0kPxY by [email protected] |
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@johncarlosbaez @pschwahn @baptnz Yes, I'm also used to up/down summation--… |
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Post #AuHlEb55B6k9IKUMxE by [email protected] |
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@BartoszMilewski @pschwahn @baptnz - I'm glad you had to force yourself to … |
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Post #AuIBjo6lOJo5TzolQO by [email protected] |
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@johncarlosbaez Regarding the discussion below, when I was learning geometric f… |
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Post #AuIDqS6TnmSTAjyuXo by [email protected] |
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@johncarlosbaez Maybe @plasmaphysics will want to get in on this discussion. |
