DOC.
10
RESEARCH NOTES
265
[132]Einstein forms
the electric
charge
flux
four-vector.
Setting
this
vector equal to
the
di-
vergence
[eq. 203]
of
Trs
would
yield
the
first
of the
two
Maxwell-Lorentz
field
equations
(see
also Einstein and Grossmann
1913
[Doc.
13], part
1, p.
19).
Kovarianter
Tensor.
Tv|IV
[133]
[p.
54]
rs
"Skr
r
t
st
dxt
T
^
+ y
ht
Iu
rs
1
\
-Y
Y
T.
2 st
V«
dxr
dxa
Wird
gleichzeitig
ms
und
at vertauscht,
so
sieht
man,
dass mittleres
Glied
wegfällt.
1
dg,rv
dg
|xi
x
+
a
Ixt
SCL
(21)G
a
V-t
^ dx
r
utBg
1
dG
V-t
G dx" G dx"
2 dx.
8raT^
St
2
dxJwSr!
»s
»T
3y
st
dx
t
dgrt
Y^ocYjt j)x
lis
SCt
JG dxa
t
d
!xr
jia
'rß
[eq. 204]