ISSN:
1573-8698
Schlagwort(e):
26A45
;
54C60
;
54C65
;
49J45
;
Mappings of bounded variation
;
metric space-valued mappings
;
jumps
;
geodesic paths
;
Helly's selection principle
;
set-valued mappings
;
regular selections
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Elektrotechnik, Elektronik, Nachrichtentechnik
Notizen:
Abstract We present the properties of mappings of bounded variation defined on a subset of the real line with values in metric and normed spaces and show that major aspects of the theory of realvalued functions of bounded variation remains valid in this case. In particular, we prove the structure theorem and obtain the continuity properties of these mappings as well as jump formulas for the variation. We establish the existence of Lipschitz continuous geodesic paths and prove an analog of the well-known Helly selection principle. For normed space-valued smooth mappings we obtain the usual integral formula for the variation without the completeness assumption on the space of values. As an application of our theory we show that compact set-valued mappings (=multifunctions) of bounded variation admit regular selections of bounded variation.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF02465896
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