Csornyei, M; (1999) On Whitney pairs. **FUND MATH** , 160 (1) 63 - 79.

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## Abstract

A simple are phi is said to be a Whitney are if there exists a non-constant function f such thatlim(x-->x0) \f(x)-f(x(0))\ / \phi(x)-phi(x(0))\ = 0for every to. G. Petruska raised the question whether there exists a simple are phi for which every subarc is a Whitney are, but for which there is no parametrization satisfyinglim(t-->t0) \t-t(0)\ / \phi(t)-phi(t(0))\ = 0.We answer this question partially, and study the structural properties of possible monotone, strictly monotone and VBG(*) functions f and associated Whitney arcs.

Type: | Article |
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Title: | On Whitney pairs |

UCL classification: | UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Mathematics |

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