DOC.
71
PRINCETON LECTURES 283
PRE-RELATIVITY PHYSICS
In
contrast to e,
h
appears
as a
quantity
which
has
the
same
type
of
symmetry
as
an
angular
velocity.
The
divergence equations
then
take
the
form
de.
dx"
dx, dx.
(19b)
(20b)
The last
equation is
a
skew-symmetrical tensor equation
of the third rank
(the
skew-symmetry
of the left-hand
side
with
respect
to
every
pair
of indices
may
easily
be
proved,
if
attention
is paid to
the
skew-symmetry
of
huv).
This notation
is
more
natural than the usual
one,
because,
in
contrast to
the
latter,
it
is applicable to
Cartesian
left-
handed
systems
as
well
as
to right-handed
systems
without
change
of
sign.
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