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:<math>\vec B \cdot \vec n = 0</math> | :<math>\vec B \cdot \vec n = 0</math> | ||
everywhere on ''S''. It is then possible to define a scalar ''flux function'' (''f'') such that its value is constant on the surface ''S'', and | everywhere on ''S''. | ||
In other words, the magnetic field does not ''cross'' the surface S anywhere, and the magnetic flux traversing ''S'' is zero. | |||
It is then possible to define a scalar ''flux function'' (''f'') such that its value is constant on the surface ''S'', and | |||
:<math>\vec B \cdot \vec \nabla f = 0</math> | :<math>\vec B \cdot \vec \nabla f = 0</math> |