Hedgehog Space
Mathematics, Cardinal number, Unit interval
978-613-7-71681-6
6137716813
56
2011-10-20
29.00 €
eng
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. In mathematics, a hedgehog space is a topological space, consisting of a set of spines joined at a point. For any cardinal number K, the K-hedgehog space is formed by taking the disjoint union of K real unit intervals identified at the origin. Each unit interval is referred to as one of the hedgehog's spines. A K-hedgehog space is sometimes called a hedgehog space of spininess K. The hedgehog space is a metric space, when endowed with the hedgehog metric d(x,y) = | x − y | if x and y lie in the same spine, and by d(x,y) = x + y if x and y lie in different spines.
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