Understanding Tangent Space of S2n+1 in Cn+1

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Homework Help Overview

The discussion revolves around determining the tangent space of the unit sphere S2n+1 in Cn+1 and exploring its properties, particularly the existence of an n-dimensional complex subspace within Cn+1.

Discussion Character

  • Exploratory, Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants discuss the definition of S2n+1 and the nature of tangent vectors at a point on the sphere. There are inquiries about the steps to remain on the sphere while moving infinitesimally from a point. Some participants express the need for a more precise characterization of the vectors in the tangent space.

Discussion Status

The conversation is ongoing, with participants seeking clarification on definitions and properties of tangent spaces. Some have suggested specific forms for tangent vector fields, while others are questioning the adequacy of previous responses and are looking for deeper insights.

Contextual Notes

There is an emphasis on understanding higher-dimensional tangent spaces compared to the simpler case of S1. Participants are navigating the complexities of defining tangent vectors in this context.

ozlem
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1. Let p be an arbitrary point on the unit sphere S2n+1 of Cn+1=R2n+2. Determine the tangent space TpS2n+1 and show that it contains an n-dimensional complex subspace of Cn+1

Homework Equations

3. It is easy to find tangent space of S1; it is only tangent vector field of S1. But what must do for higher dimension and how can I show it contains an n-dimensional subspace of Cn+1. Thanks for your helps.
 
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What is the definition of ##S^{2n+1}##? Given a point on the sphere, what infinitesimal Steps can you take from that point and still be on the sphere?
 
ozlem said:
It is easy to find tangent space of S1; it is only tangent vector field of S1.
By the way, this does not really answer the question. You are essentially saying "the tangent space is the tangent space". You should specify exactly what type of vectors are in this space.
 
Orodruin said:
By the way, this does not really answer the question. You are essentially saying "the tangent space is the tangent space". You should specify exactly what type of vectors are in this space.
I think that tangent vector field must be
X=-x2d/dx1+x1d/dx2 for any P(x1,x2) point on the C1. d/dx stand for partial derivative.
 
ozlem said:
I think that tangent vector field must be
X=-x2d/dx1+x1d/dx2 for any P(x1,x2) point on the C1. d/dx stand for partial derivative.
And how did you figure this out?

Edit: Also note that any vector proportional to that one will do.
 

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