Graphics Reference
In-Depth Information
S
=
P
2
:
(b)
n
0
≥
≥
≥
6
15
10
n
n
1
2
S
=
S
1
¥
S
1
:
n
0
≥
≥
≥
7
21
14
(c)
n
n
1
2
Hint:
Use facts about the Euler characteristic and relations between the numbers n
i
as was done in the proof of Theorem 6.1.2.
Section 6.6
6.6.1.
Triangulate the bordered surface shown in Figure 6.29. What is its Euler characteris-
tic? Represent the surface as a disk with handles.
