hausdorff metric

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In the abstract metric space of all compact subsets of \mathbb{R}^n, given a pair of compact sets A and B, the Hausdorff metric is h(A,B) = \mbox{max} \{\rho(A,B), \rho(B,A)\} where \rho(A,B) = \sup_{a\in A} \inf_{b\in B} \, d(a,b) , where d is the Euclidean metric in \mathbb{R}^n

h(A,B) = 0 iff A = B.

hausdorff metric
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