Why Nostr? What is Njump?
2025-01-19 01:31:37
in reply to

John Carlos Baez on Nostr: nprofile1q…cvgna wrote: "Firstly, where can I learn more about magnetic diffusion, ...

wrote:

"Firstly, where can I learn more about magnetic diffusion, or more generally, vector valued diffusion?"

Since the vector-valued heat equation is just like 3 copies of the usual heat equation, every fact you know about heat equation applies!

The full-fledged magnetic diffusion equation is nonlinear and thus more complicated; you can learn a bit more about it by clicking on "magnetic diffusivity" in my blog, and even more by going to the reference by Ogilvie that I recommend.

"Secondly, and more trivially, I got confused by the seemingly twice defined quantity in your post shown in the screenshots below."

I used two names for it but it's the same thing, ρ𝐯, so I should get rid of one of those names. Thanks!
Author Public Key
npub17u6xav5rjq4d48fpcyy6j05rz2xelp7clnl8ptvpnval9tvmectqp8pd6m