A family of pseudo metrics on B^3 and its application

Details A family of pseudo metrics on B^3 and its application A family of pseudo metrics on B^3 and its application

2002-01-10

arxiv.org/abs/math/0201077v5

Mathematics

General Topology

14 pages, 5 figures, A section of v3 is appeared on Rocky Mountain Journal of Mathematics 36(2006) no.6 1927-1935. Similar con

Scientific paper

Let B^3 be the closed unit ball in R^3 and S^2 its boundary. We define a
family of pseudo metrics on B^3. As an application, We prove that for any
countable-to-one function f:S^2\to [0,a], the set NM^n_f={x\in S^2 | there
exists y\in S^2 such that f(x)-f(y)>nd_E(x,y)} is uncountable for all natural
number n, where d_E is the Euclidean metric on R^3.

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