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I have found that arbitrary real n-spheres cannot be contracted to a point, at least that's what I found on wiki. But I am wondering if a manifold in $\mathbb{C}^n$ given by $|z_1|^2 + |z_2|^2 + ... + |z_n|^2 =1$ can be deformed continuously into one of the z's on the manifold, say, $z_{n'}$. Is such a deformation possible?

Thanks in advance,

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The "contractibility" of a space does not need mention of an ambient space that it lies in... your sphere can be in complex space or real space, but they are both topologically your standard $S^n$, which is not contractible (unless $n=\infty$). In any case, this question is not appropriate for this forum; try math.stackexchange.com – Chris Gerig Jan 12 2012 at 7:47
It might help to spend some more time with the definition of "contractible". – S. Carnahan Jan 12 2012 at 8:58
Actually it seems that not even the notion of a "variable" is clear. – Kofi Jan 12 2012 at 9:08

closed as too localized by Yemon Choi, Dan Petersen, Andrew Stacey, S. Carnahan Jan 12 2012 at 8:56

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