Separately continuous functions on products of locally convex spaces with the weak topology
✍ Scribed by V. V. Mikhailyuk
- Publisher
- Springer US
- Year
- 1999
- Tongue
- English
- Weight
- 337 KB
- Volume
- 96
- Category
- Article
- ISSN
- 1573-8795
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📜 SIMILAR VOLUMES
## Abstract Let __X__(μ) be a Banach function space. In this paper we introduce two new geometric notions, __q__‐convexity and weak __q__‐convexity associated to a subset __S__ of the unit ball of the dual of __X__(μ), 1 ≤ __q__ < ∞. We prove that in the general case both notions are not equivalent
Let Ω ⊂ R N be a bounded open set and let g: Ω × R → R be a Carathéodory function that satisfies standard growth conditions. Then the functional Φ(u) = Ω g (x, u(x)) dx is weakly continuous on W 1,p 0 (Ω), 1 ≤ p ≤ ∞, if and only if g is linear in the second variable.