All a b c d e f g h i j k l m n o p q r s t u v w x y z Other

Previous Page 2 Next

Displaying 21 – 40 of 307

Showing per page

A result forO2-convergence to be topological in posets

Qingguo Li, Zhiwei Zou (2016)

Open Mathematics

In this paper, the α waybelow relation, which is determined by O2-convergence, is characterized by the order on a poset, and a sufficient and necessary condition for O2-convergence to be topological is obtained.

A very general covering property

Paolo Lipparini (2012)

Commentationes Mathematicae Universitatis Carolinae

We introduce a general notion of covering property, of which many classical definitions are particular instances. Notions of closure under various sorts of convergence, or, more generally, under taking kinds of accumulation points, are shown to be equivalent to a covering property in the sense considered here (Corollary 3.10). Conversely, every covering property is equivalent to the existence of appropriate kinds of accumulation points for arbitrary sequences on some fixed index set (Corollary 3.5)....

Absolutely strongly star-Hurewicz spaces

Yan-Kui Song (2015)

Open Mathematics

A space X is absolutely strongly star-Hurewicz if for each sequence (Un :n ∈ℕ/ of open covers of X and each dense subset D of X, there exists a sequence (Fn :n ∈ℕ/ of finite subsets of D such that for each x ∈X, x ∈St(Fn; Un) for all but finitely many n. In this paper, we investigate the relationships between absolutely strongly star-Hurewicz spaces and related spaces, and also study topological properties of absolutely strongly star-Hurewicz spaces.

C p ( I ) is not subsequential

Viacheslav I. Malykhin (1999)

Commentationes Mathematicae Universitatis Carolinae

If a separable dense in itself metric space is not a union of countably many nowhere dense subsets, then its C p -space is not subsequential.

Caratterizzazione dei Γ -limiti d'ostacoli unilaterali

Placido Longo (1984)

Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni

In this paper we complete the characterization of those f , μ and ν such that ∥ w ∥ H 1 ⁢ ( Ω ) 2 + ∫ B f ⁢ ( x , w ⁢ ( x ) ) ⁢ d ⁢ μ + ν ⁢ ( B ) is Γ ⁢ ( L 2 ⁢ ( Ω ) - ) limit of a sequence of obstacles ∥ w ∥ H 1 ⁢ ( Ω ) 2 + Φ h ⁢ ( w , B ) where Φ h ⁢ ( w , B ) = { 0 if ⁢ w ≥ φ h ⁢ a.e. ⁢ o ⁢ n ⁢ B , + ∞ otherwise .

Currently displaying 21 – 40 of 307