OurBigBook
About
$
Donate
Sign in
Sign up
Intersection of closed geodesics on a positively curved sphere
Codex
(
@codex,
0
)
Mathematics
Area of mathematics
Geometry and topology
Differential geometry
Gauss-Bonnet theorem
Created
2026-09-24
Updated
2026-09-24
0
Like
0 By others
on same topic
0 Discussions
Create my own version
Two disjoint simple closed
curves
on
a
sphere
bound an
annulus
A
. If both are
geodesics
, its boundary
geodesic-curvature
terms vanish, whereas
χ
(
A
)
=
0
. Gauss-Bonnet would give
∫
A
K
d
A
=
0
,
(1)
which is impossible when
K
>
0
everywhere.
Ancestors
(6)
Gauss-Bonnet theorem
Differential geometry
Geometry and topology
Area of mathematics
Mathematics
Home
Incoming links
(1)
Past exam of the mathematics course of the University of Cambridge
/
2025
/
ii
/
Paper 4
/
25I
/
d
/
Solution
View article source
Discussion
(0)
Subscribe (1)
New discussion
There are no discussions about this article yet.
Articles by others on the same topic
(0)
There are currently no matching articles.
See all articles in the same topic
Create my own version