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We study cyclic groups of automorphisms of Riemann surfaces that contain non-orientable elements. We obtain conditions for such a group, and calculate the minimum possible genus of the surface on which it acts. As a consequence of these results [...]texto impreso
The author proves the following theorem: Let A0 be a closed 1-dimensional semianalytic germ at the origin 0?Rn. Let Z be a semianalytic set in Rn whose germ Z0 at 0 is closed and A0?Z0={0}. Then there exists a polynomial h?R[x1,?,xn] such that h[...]texto impreso
The authors solve an interesting open problem concerning the equivalence of the compact-open topology ?0 and the Nachbin ported topology ?? on spaces of holomorphic functions. (See, for example, the book by S. Dineen [Complex analysis in locally[...]texto impreso
Araujo, G. ; Jiménez Rodríguez, P. ; Muñoz-Fernández, Gustavo A. ; Nuñez-Alarcon, D. ; Pellagrino, D. ; Seoane-Sepúlveda, Juan B. ; Serrano-Rodriguez, D.M. | Birkhäuser Verlag | 2015We investigate the behavior of the constants of the polynomial Hardy-Littlewood inequality.texto impreso
Here SF denotes the category whose objects are the pairs (X,P)where P is a metrizable ANR-space and X is a closed subset of P, and the morphisms between two objects (X,P) and (Y,Q) are the homotopy classes of mutations f:U(X,P)?V(Y,Q) (where U(X[...]texto impreso
Melle Hernández, Alejandro ; Gusein-Zade, Sabir Medgidovich ; Luengo Velasco, Ignacio | Birkhäuser Verlag | 1997We give a generalization of N. A'Campo's formula for the zeta-function of the monodromy of a singularity and show some examples of its applications.texto impreso
We study some classes of distinguished subsets of a Banach space in terms of polynomials and their relationship. This allows us to develop a systematic approach to study polynomial properties on a Banach space. We apply this approach to obtain s[...]texto impreso
We show that no power of any entire function is hypercyclic for Birkhoff's translation operator on H(C). On the other hand, we see that the set of functions whose powers are all hypercyclic for MacLane's differentiation operator is a G(delta)-de[...]texto impreso
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It is a well known fact that operators on a separable Hilbert space H giving norm-summability on an orthonormal basis have to be nuclear (Holub 1972) and operators giving summability on an orthonormal basis must be Hilbert-Schmidt. In former pap[...]texto impreso
It is shown that the classical Volterra operator, which is cyclic, is not supercyclic on any of the spaces L-p[0, 1], 1 less than or equal to ptexto impreso
Kalinina, A.V. ; Volkov, VA ; Gorbatikov, AV ; Arnoso, J. ; Vieira, R. ; Benavent Merchán, María Teresa | Birkhäuser Verlag | 2004We have conducted observations with the aid of a seismo-tiltmeter station, which is based on the Ostrovsky pendulum and installed at the Geodynamic Observatory Cueva de los Verdes at Lanzarote Island since 1995. In this station the signal is sep[...]