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Mostrando ítems 101-110 de 509
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Some new properties of composition operators associated with lens maps
(Springer, 2013-05)
We give examples of results on composition operators connected with lens maps. The first two concern the approximation numbers of those operators acting on the usual Hardy space H2. The last ones are connected with ...
Artículo
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Error Analysis of Proper Orthogonal Decomposition Stabilized Methods for Incompressible Flows
(Society for Industrial and Applied Mathematics, 2020-06-02)
Proper orthogonal decomposition (POD) stabilized methods for the Navier--Stokesequations are considered and analyzed. We consider two cases: the case in which the snapshots arebased on a non inf-sup stable method and the ...
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Structural and recurrence relations for hypergeometric-type functions by Nikiforov-Uvarov method
(Kent State University, 2009)
The functions of hypergeometric-type are the solutions y = yν(z) of the differential equation σ(z)y ′′ + τ(z)y ′ + λy = 0, where σ and τ are polynomials of degrees not higher than 2 and 1, respectively, and λ is a constant. ...
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On the limit of non-standard q-Racah polynomials
(2014-03-15)
The aim of this article is to study the limit transitions from non-standard q-Racah polynomials to big q-Jacobi, dual q-Hahn, and q-Hahn polynomials such that the orthogonality properties and the three-term recurrence ...
Artículo
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Structure of the fixed point set and common fixed points of asymptotically nonexpansive mappings
(American Mathematical Society, 2001)
Let X be a Banach space, C a weakly compact convex subset of X and T : C → C an asymptotically nonexpansive mapping. Under the usual assumptions on X which assure the existence of fixed point for T, we prove that the set ...
Artículo
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Norms of hypercyclic sequences
(The European Digital Mathematics Library, 2004)
In this note, is proved that every member of a wide class of Banach spaces supports a sequence (Tn) of operators with a hereditary hypercyclic subsequence (Tnk) such that (Tn) itself does not satisfy the so-called ...
Artículo
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Funciones derivables en cuaterniones
(Real Sociedad Matemática Española, 1975)
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Existence, uniqueness and global behavior of the solutions to some nonlinear vector equations in a finite dimensional Hilbert space
(Elsevier, 2017-09)
The initial value problem and global properties of solutions are studied for the vectorequation:(∥u′∥lu′)′ + ∥A1/2u∥β Au + g(u′) = 0 in a finite dimensional Hilbert space under suitable assumptions on g.
Artículo
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Again on the weak law in martingale type p Banach spaces
(Universidad de Extremadura, 1999)
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A test for the Riemann hypotesis
(Adam Mickiewicz University, 2008-09)
We prove that the Riemann Hypothesis holds if and only if I = Z +∞ 1 ˘ Π(x) − Li(x) ¯2 x −2 dx < +∞ with I = J, where J is some definite, computable real number (1.266 < J < 1.273). This provides us with a numerical test ...