Results 21 to 30 of about 330 (211)

Arithmetic surjectivity for zero-cycles [PDF]

open access: yesMathematical Research Letters, 2020
Let $f:X\to Y$ be a proper, dominant morphism of smooth varieties over a number field $k$. When is it true that for almost all places $v$ of $k$, the fibre $X_P$ over any point $P\in Y(k_v)$ contains a zero-cycle of degree $1$? We develop a necessary and sufficient condition to answer this question.
openaire   +2 more sources

On the fullness of surjective maps of an interval [PDF]

open access: yesTransactions of the American Mathematical Society, 1982
Let I = [ 0 , 1
Proppe, Harold, Boyarsky, Abraham
openaire   +1 more source

Post-surjectivity and balancedness of cellular automata over groups [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2017
We discuss cellular automata over arbitrary finitely generated groups. We call a cellular automaton post-surjective if for any pair of asymptotic configurations, every pre-image of one is asymptotic to a pre-image of the other.
Silvio Capobianco   +2 more
doaj   +1 more source

Stability of Surjectivity

open access: yesJournal of Approximation Theory, 2000
Let \(S\) be a set, let \(X\), \(Y\) be Banach spaces, and let \(\varepsilon\geq 0\) be arbitrary. We say that a function \(f: S\to X\) is \(\varepsilon\)-onto if \(\forall_{x\in X} \exists_{s\in S}\|x-f(s)\|\leq \varepsilon\). Cleary a given function is \(0\)-onto iff it is a surjection. A Banach space \(X\) is said to have property (D) if every dense
openaire   +2 more sources

Surjectivity of an operator [PDF]

open access: yesCzechoslovak Mathematical Journal, 1990
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +2 more sources

On the surjective Dunford-Pettis Property [PDF]

open access: yesMathematische Zeitschrift, 1990
A Banach space E has the Dunford-Pettis property if every operator from E into a reflexive Banach space is a Dunford-Pettis operator. D. Leung [Math. Z. 197, 21-32 (1988] introduced a formally weaker property, the surjective Dunford-Pettis property, by imposing that every operator from E onto a reflexive Banach space is Dunford-Pettis. This property is
Mendoza, José   +2 more
openaire   +2 more sources

Existence and Uniqueness of Solutions for the p(x)-Laplacian Equation with Convection Term

open access: yesMathematics, 2020
In this paper, we consider the existence and uniqueness of solutions for a quasilinear elliptic equation with a variable exponent and a reaction term depending on the gradient.
Bin-Sheng Wang, Gang-Ling Hou, Bin Ge
doaj   +1 more source

Solvability of Parametric Elliptic Systems with Variable Exponents

open access: yesMoroccan Journal of Pure and Applied Analysis, 2023
In this paper, we study the solvability to the left of the positive infimum of all eigenvalues for some non-resonant quasilinear elliptic problems involving variable exponents.
Ouannasser Anass   +1 more
doaj   +1 more source

On the surjectivity of linear transformations

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1996
Let B be a reflexive Banach space, X a locally convex space and T:B→X (not necessarily bounded) linear transformation. A necessary and sufficient condition is obtained so that for a given v∈X there is a solution for the equation Tu=v. This result is used
M. Damlakhi, V. Anandam
doaj   +1 more source

On Expansive Mappings

open access: yesMathematics, 2019
When finding an original proof to a known result describing expansive mappings on compact metric spaces as surjective isometries, we reveal that relaxing the condition of compactness to total boundedness preserves the isometry property and nearly that of
Marat V. Markin, Edward S. Sichel
doaj   +1 more source

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