n*******d
发帖数: 650 | 1 of course there are! Math defination are based on physics meaning.
this stuff is called field theory. How can it be without physics meaning?
Divergence:
field flux across infinitesmal closed curve. in static electrical case, it is
equal to the local charge density.
Gradient: consider a field F(x,y), Gradient(F) is the slope of F at (x,y). It
has direction. if phi is potential, Grad(phi)=field
Curl: this is useful for those kind of field whose field lines are closed. for
example: magnetic field
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