Geography Reference
In-Depth Information
Table 22.36
Variational calculus:
δ
dS
l
2
tr
C
l
G
−
l
= 0 (second part)
“
integration by parts: Green's First Identity
”
dL
dQ
(
η
L
δη
L
+
η
Q
δη
Q
)=
dL
dQδη
(
η
LL
+
η
QQ
)=0
∀
δη
∈
S
l
(22.239)
↔
η
LL
+
η
QQ
= 0
(22.240)
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