نتایج جستجو برای: countable compactness

تعداد نتایج: 13875  

Journal: :Bulletin of the American Mathematical Society 1946

Journal: :Journal of the Australian Mathematical Society 1973

Journal: :Bulletin of the Australian Mathematical Society 1974

G. Roshani H. Zarei M. Eftekhari S. A. R. Movahedi Naeini S. Javahery

Under favorable soil conditions such as existence of easily destructible organic compounds, balanced heat and moisture, adequate ventilation and abundant nutrients, organic materials are mineralized. Once mineralizing occurs, mineral elements like P, S, Ca, Mg, K and other cations are released. A related study was conducted to determine the effect of seven organic fertilizers (Leaf Mold (LM), R...

Journal: :Topology and its Applications 2000

Journal: :Transactions of the American Mathematical Society 1984

Journal: :Fundamenta Mathematicae 2000

Journal: :Annali di Matematica Pura ed Applicata 2021

For $$p \in (1,N)$$ and $$\Omega \subseteq {\mathbb {R}}^N$$ open, the Beppo-Levi space $${\mathcal {D}}^{1,p}_0(\Omega )$$ is completion of $$C_c^{\infty }(\Omega with respect to norm $$\left[ \int _{\Omega }|\nabla u|^p dx \right] ^ \frac{1}{p}.$$ Using p-capacity, we define a then identify Banach function {H}}(\Omega set all g in $$L^1_{loc}(\Omega that admits following Hardy–Sobolev ty...

2004
Gonçalo Gutierres

In this paper it is studied the role of the axiom of choice in some theorems in which the concepts of first and second countability are used. Results such as the following are established: (1) In ZF (Zermelo–Fraenkel set theory without the axiom of choice), equivalent are: (i) every base of a second countable space has a countable subfamily which is a base; (ii) the axiom of countable choice fo...

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