Geoscience Reference
In-Depth Information
z
y
C
x
Fig. 9.8
Illustration to y;x;
z
2 Ext.C/ in counterclockwise order
y
2
C
2
C
1
y
1
y
3
C
6
x
C
3
y
6
C
5
y
4
C
4
y
5
Fig. 9.9
Illustration to Lemma
9.1
with P
x
D 6
and
i
2f
1;:::;P
x
g
, then the following holds (assume that
i
C
1
D
1
whenever
i
D
P
x
):
8
<
9
=
sit
.C
i
;x/
D
S1
or
sit
.C
iC1
;x/
D
S1
Par
or
sit
.C
i
;x/
2f
S2;S3
g
sit
.C
iC1
;x/
2f
S2;S4
g
xy
iC1
X
()
:
;
Par
f
1
;f
2
.
These results validate the following algorithm for finding
X