Abstract
We recall the definition of the
and
where \( ||x|| = \sqrt {\sum\nolimits_{i = 0}^n {x_i^2} } . \). The open ball, \( \mathop{{{{\mathbb{B}}^n}}}\limits^{ \circ } = \{ y \in {{\mathbb{R}}^n}|\left\| y \right\| < 1\} \) is also called standard n-cell. Let \( Q = (0, \ldots, 0,1) \in {{\mathbb{S}}^n} \), the point with last coordinate Q n = 1.
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- 1.
In fact, already V ≈ W implies m = n (see 7.4).
- 2.
The converse is also true; cf. Spanier 7.5.7.
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© 1995 Springer-Verlag Berlin Heidelberg
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Dold, A. (1995). Applications to Euclidean Space. In: Lectures on Algebraic Topology. Classics in Mathematics. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-67821-9_4
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DOI: https://doi.org/10.1007/978-3-642-67821-9_4
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