Abstract
In this chapter we formulate the notion of a manifold, which generalizes the familiar ideas of a (smooth) curve or surface. The intuitive idea of a curve in R2 or R3 is that of a subset C of R2 or R3 which locally looks like a segment of the real line; in other words, if p ∈ C, there should be a neighborhood U of p in R2 and an interval (a, b) in R, together with a bijective map a : (a, b) → C ∩ U which is bicontinuous. If p is an endpoint of C, the interval (a, b) should be replaced by an interval [a, b) or (a, b]. This formulation is purely topological, i.e., defined in terms of continuity; we want to restrict our attention to differentiate curves, which should mean that α and α-1 are required to be differentiate. We have to explain what we mean by α-1 being differentiable, since its domain is not an open subset of R3. We will also formulate the notion of the tangent space to a differentiate manifold, generalizing the familiar ideas of tangent line to a curve or tangent plane to a surface, and discuss the idea of orientation.
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© 1996 Springer Science+Business Media New York
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Browder, A. (1996). Manifolds. In: Mathematical Analysis. Undergraduate Texts in Mathematics. Springer, New York, NY. https://doi.org/10.1007/978-1-4612-0715-3_11
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DOI: https://doi.org/10.1007/978-1-4612-0715-3_11
Publisher Name: Springer, New York, NY
Print ISBN: 978-1-4612-6879-6
Online ISBN: 978-1-4612-0715-3
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