Post BAJXmLo8KScCCYyplI by wolf480pl@mstdn.io
 (DIR) More posts by wolf480pl@mstdn.io
 (DIR) Post #BAJXmLbN5uPHYz0ds0 by sjb@mstdn.io
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       With all this talk of 3D Navier-Stokes, I found it quite interesting to look up what the situation for 2D was.  No unexpected singularities, although if you allow non-smooth initial conditions the solution might not even be unique!   #mathshttps://x.com/i/grok/share/aaadd27649d2429ead73d08dcc0cf29e
       
 (DIR) Post #BAJXmLo8KScCCYyplI by wolf480pl@mstdn.io
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       @sjb does a non-unique solution imply the real-world situation is path-dependent / has multiple steady states?
       
 (DIR) Post #BAJaZGZykwWW5HoPeC by sjb@mstdn.io
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       @wolf480pl I don't think it can happen in the real world as it needs a discontinuity in the initial condition.