DOC.

10

RESEARCH NOTES

235

[eq. 95]

[eq. 96]

3lgG digG

c

3fT

+

V~0üc

aigG,

pa

~*ga

dy

dxö

dxa

dxa

dxa dxa

aa

^

3lgO

^^pa

+

2

9

dxa

V

^Kp

(

"Ik

dxt

I

+

8'P

»'i

l

p

k a

kdx

y

j

k

p

a

ß

[eq. 97]

KaX

3ym

1[72]

1

4^ä^ä^+2«

4

war

richtig.

[70]Einstein calculates the Riemann

curvature

scalar

cp

produced

by

fully contracting

the

Riemann

curvature tensor

[eq.

91]

of

[p.

27].

The

expansion

of

p

continues until

[p. 32].

[71]Einstein

begins expansion

of the

first

term

in

the second summation of

[eq. 94].

The

re-

sult

is 1/4

times the

sum

of the three underlined

terms

[eq.

95],

[eq.

96],

[eq. 97].

[72]Einstein

begins to

recalculate the

term

which

yielded expression

[eq.

97],

but

stops

since the

original

"was correct"

("war richtig").

[p. 29]

[73]

i

I K m

[eq.

98]

a

P

^Slo

dgu

\

dg,^\Km

YpaX'm^K/

+

dx:

do

^&Kp

dx

^

dx dx

/ V

m K

P

/

'Sic

^5

dSi(y

io

dypmw'

YpaXm^K/~

~Yk/

dx,