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At 01:05 PM 7/30/00 -0500, Jack Uretsky wrote:
Hi all-
Interesting thought: Changing the "zero" from which potential
is measured is like a gauge transformation.
Yup, it's always nice to have a connection between
-- feet on the ground: moving the black lead of the voltmeter
from one node to another, and
-- head in the clouds: gauge transformations.
But... why be so tentative?
-- Why say it "is like" a gauge transformation
rather than "is" a gauge transformation?
-- Is there a definition of gauge transformation under which
phi -> phi + const is not a full-fledged member?
(Of course nobody is suggesting this is the only gauge transformation).