- Tytuł:
- Best approximations, fixed points and parametric projections
- Autorzy:
- Cardinali, Tiziana
- Powiązania:
- https://bibliotekanauki.pl/articles/729491.pdf
- Data publikacji:
- 2002
- Wydawca:
- Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
- Tematy:
-
fixed point
parametric projection
best approximation
upper semicontinuous
partially closed graph
f-approximatively compact
Oshman space - Opis:
- If f is a continuous seminorm, we prove two f-best approximation theorems for functions Φ not necessarily continuous as a consequence of our version of Glebov's fixed point theorem. Moreover, we obtain another fixed point theorem that improves a recent result of [4]. In the last section, we study continuity-type properties of set valued parametric projections and our results improve recent theorems due to Mabizela [11].
- Źródło:
-
Discussiones Mathematicae, Differential Inclusions, Control and Optimization; 2002, 22, 2; 243-260
1509-9407 - Pojawia się w:
- Discussiones Mathematicae, Differential Inclusions, Control and Optimization
- Dostawca treści:
- Biblioteka Nauki
Artykuł