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user 81645
1
vote
1
answer
114
views
Does the rational normal curve embedding extend as a mapping from the "bulk" to some bigger ...
The complex projective line $\mathbb{P}^1(\mathbb{C})$ can be identified with the sphere at infinity of hyperbolic $3$-space, modeled say by the Poincare open $3$-ball in $\mathbb{R}^3$ (the sphere at …
CommunityBot
- 1
25
votes
1
answer
1k
views
On a curious map from the complex projective plane into $S^5$
I have heavily edited the post (including the title), based on a comment by @GregoryArone that my map $f$ is not injective. In an earlier version of this post, I had thought to have constructed a smoo …
- 5,215
8
votes
0
answers
93
views
Is there a quaternionic analogue of Kodaira's embedding theorem?
Let $M$ be a $4m$-dimensional Quaternion-Kähler manifold of positive scalar curvature. Does there exist an $n$ large enough, so that $M$ can be embedded inside $\mathbb{H}P^n$ via a quaternionic embed …
- 5,215