3-sphere
前言
基本性質
(1)metric (2)Ricci tensor (3)geodesics
(4)S^3上的minimal surface
Simon Brendle
[
ResearchGate
]
(5)S^3上的vector fields
SU(2) SO(3) IxS^2 (1)expotential map on SO(3)
Poincare 猜想
S^3的譜