کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5777817 | 1633050 | 2017 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
On the set of optimal homeomorphisms for the natural pseudo-distance associated with the Lie group S1
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موضوعات مرتبط
مهندسی و علوم پایه
ریاضیات
هندسه و توپولوژی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
If Ï and Ï are two continuous real-valued functions defined on a compact topological space X and G is a subgroup of the group of all homeomorphisms of X onto itself, the natural pseudo-distance dG(Ï,Ï) is defined as the infimum of L(g)=âÏâÏâgââ, as g varies in G. In this paper, we make a first step towards extending the study of this concept to the case of Lie groups, by assuming X=G=S1. In particular, we study the set of the optimal homeomorphisms for dG, i.e. the elements Ïα of S1 such that L(Ïα) is equal to dG(Ï,Ï). As our main results, we give conditions that a homeomorphism has to meet in order to be optimal, and we prove that the set of the optimal homeomorphisms is finite under suitable conditions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Topology and its Applications - Volume 229, 15 September 2017, Pages 187-195
Journal: Topology and its Applications - Volume 229, 15 September 2017, Pages 187-195
نویسندگان
Alessandro De Gregorio,