On homeomorphisms and $C^{1}$ maps
General Mathematics
2018-05-01 v1
Abstract
Our purpose in this article is first, following [8], to prove that if α, β are any points of the open unit disc D(0;1) in the complex plane C and r, s are any positive real numbers such that D(α;r)⊆D(0;1) and D(β;s)⊆D(0;1), then there exist t∈(0,1) and a homeomorphism h:D(0;1)→D(0;1) such that D(α;r)⊆D(0;t), D(β;s)⊆D(0;t), h[D(α;r)]=D(β;s) and h=id on D(0;1)∖D(0;t), and second, following [9], to prove that if q∈N∖{0,1} and B(0;1) is the open unit ball in Rq, while for any t>0, we set f(t)(x)=1+(t−1)∥x∥tx, whenever x∈B(0;1), then f(t)→id in C1(B(0;1),Rq) as t→1+.
Cite
@article{arxiv.1804.10691,
title = {On homeomorphisms and $C^{1}$ maps},
author = {Nikolaos E. Sofronidis},
journal= {arXiv preprint arXiv:1804.10691},
year = {2018}
}