Schotten, Hans D.; Uusitalo, Mikko A.; Monserrat del Río, José Francisco; Queseth, Olav(Institute of Electrical and Electronics Engineers (IEEE), 2015-07)
The arrival of the fifth generation (5G) is expected to come together with three important enablers. First, the densification of access nodes will continue. Second, 5G networks must be highly flexible and adapt to the ...
Bonet Solves, José Antonio; DOMANSKI, PAWEL(Springer-Verlag, 2017-01)
[EN] In this paper the spectrum of composition operators on the space of real analytic functions is investigated. In some cases it is completely determined while in some other cases it is only estimated.
[EN] We prove that under some mild conditions on the symbol phi, the spectrum of the corresponding composition operator C-phi on the Korenblum type spaces A_(-alpha) and A(+)(-alpha) contains a closed ball of positive radius.
Bonet Solves, José Antonio; Domanski, Pawel(Springer Verlag (Germany), 2015-04)
We obtain full description of eigenvalues and eigenvectors
of composition operators Cϕ : A (R) → A (R) for a real analytic self
map ϕ : R → R as well as an isomorphic description of corresponding
eigenspaces. We completely ...
Nuño Fernández, Luis(Universitat Politècnica de València, 2018-06-25)
The sound of a musical instrument can be represented either in time domain (envelope, waveform) or in frequency domain (spectrum, harmonics). The variation of the spectrum is analysed as a function of the sound length, the ...
[EN] In previous papers, the authors introduced and characterized a class of matrices called
{K, s+1}-potent. Also, they established a method to construct these matrices. The purpose
of this paper is to solve the associated ...
Manjón, Francisco-Javier; Gallego-Parra, Samuel; Rodríguez Hernández, Plácida; Muñoz, Alfonso; Drasar, Cestmir; Muñoz-Sanjosé, Vicente; Oeckler, Oliver(The Royal Society of Chemistry, 2021-05-21)
[EN] Two anomalous broad bands are usually found in the Raman spectrum of bulk and 2D Te-based chalcogenides, which include binary compounds, like ZnTe, CdTe, HgTe, GaTe, GeTe, SnTe, PbTe, GeTe2, As2Te3, Sb2Te3, Bi2Te3, ...
Renuncio Gabarda, Laura(Universitat Politècnica de València, 2017-09-15)
[ES] El cacao ha incrementado su precio en el mercado en los últimos años. Por este
motivo, se sospecha que determinados comerciantes de cacao podrían estar adulterando el
cacao en polvo con otros ingredientes más baratos. ...
Gómez Barquero, David; Caldwell, M. Winston(Institute of Electrical and Electronics Engineers (IEEE), 2015-07)
This article presents an overview of the upcoming television broadcast spectrum incentive
auction in the U.S., which will be the first ever attempted worldwide, and discusses the main business, regulatory, and technical ...
Lebtahi Ep-Kadi-Hahifi, Leila; Romero Martínez, José Oscar; Thome, Néstor(Elsevier, 2012-01-15)
Recently, situations where a matrix coincides with some of its powers have been studied. This kind of matrices is related to the generalized inverse matrices. On the other hand, it is possible to introduce another class ...
[EN] The Cluster Value Theorem is known for being a weak version of the classical Corona Theorem. Given a Banach space X, we study the Cluster Value Problem for the ball algebra A(u)(B-X), the Banach algebra of all uniformly ...
Albanese, Angela Ama; Bonet Solves, José Antonio; Ricker, Werner J.(Elsevier, 2013-05-01)
Every Köthe echelon Fréchet space XX that is Montel and not isomorphic to a countable product of copies of the scalar field admits a power bounded continuous linear operator TT such that I−TI−T does not have closed range, ...
[EN] While the article was in publication process, we found a mistake in a key tool for the proof one of the main results. As a consequence, our result on the ball A(u)(B-X) algebra remains open. For the algebra H-b(X) we ...
Martínez Herrera, Caridad Marina(Universitat Politècnica de València, 2020-07-31)
[EN] ASD or Autism spectrum disorder is a set of developmental disorders that today affects 1 in 100 births in Europe and 1 in 88 in the USA . It is said spectrum because there is a great variety in the level of affectation ...
FERNÁNDEZ ROSELL, CARMEN; GALBIS VERDU, ANTONIO; Jorda Mora, Enrique(Elsevier, 2018)
[EN] In this paper we study the dynamics of the composition operators defined in the Schwartz space of rapidly decreasing functions. We prove that such an operator is never supercyclic and, for monotonic symbols, it is ...
Albanese, Angela A.; Bonet Solves, José Antonio; Ricker, Werner J.(Springer-Verlag, 2016)
[EN] The spectrum and point spectrum of the Cesaro averaging operator C acting on the Frechet space C-infinity(R+) of all C-infinity functions on the interval [0, infinity) are determined. We employ an approach via ...
[EN] Metamerism is a problem suffered by specialists in the field of photography and graphic arts. This
phenomenon causes two colors that are different cannot be correctly distinguished, could be for
various reasons, ...
[EN] In general, there are several many devices that can overload the network and reduce performance. Devices can minimize interference and optimize bandwidth usage by using directional antennas and by avoiding overlapping ...
Nuño Fernández, Luis(Universitat Politècnica de València, 2019-06-18)
Three different signals are analyzed, one electronic with complex tones, and two real, piano and violin. In each case, the first 3 harmonics are played separately, then the group of first harmonics having greater strength, ...
Alaste, Tomi Matias(Editorial Universitat Politècnica de València, 2014-10-01)
[EN] Let F be a lattice of real-valued functions on a non-empty set X such that F contains the constant functions. Using certain filters on X determined by F, we construct a compact Hausdorff topological space δX with the ...