[EN] Let A and B be two generalized quadratic matrices with respect to idempotent matrices P and
Q, respectively, such that (A − αP)(A − βP) = 0, AP = PA = A, (B − γ Q)(B − δQ) = 0, BQ =
QB = B, PQ = QP, AB = BA, and (A ...
Bonet Solves, José Antonio; Ricker, Werner J.(Adam Mickiewicz University, 2021-03)
[EN] The dual spaces d(p), 1 < p < infinity, of the discrete Cesaro (Banach) spaces ces(q), 1 < q < infinity, were studied by G. Bennett, A. Jagers and others. These (reflexive) dual Banach spaces induce the non-normable ...
Albanese, Angela A.; Bonet Solves, José Antonio; Ricker, Werner J.(Springer-Verlag, 2019-04)
[EN] The Fréchet sequence spaces ces(p+) are very different to the Fréchet sequence spaces ¿p+,1¿p<¿, that generate them, (Albanese et al. in J Math Anal Appl 458:1314¿1323, 2018). The aim of this paper is to investigate ...
Bonet Solves, José Antonio; Ricker, Werner J.(Springer-Verlag, 2020-07)
[EN] The discrete Cesàro operator C acts continuously in various classical Banach sequence spaces within CN. For the coordinatewise order, many such sequence spaces X are also complex Banach lattices [eg. c0,¿p for 1<p¿¿, ...
Fuente Herraiz, David; Lazar, Dusan; Oliver Villanueva, José Vicente; Urchueguía Schölzel, Javier Fermín(Springer-Verlag, 2021-01)
[EN] In this work, we reconstructed the absorption spectrum of different Synechocystis sp. PCC 6803 optical strains by summing the computed signature of all pigments present in this organism. To do so, modifications to in ...
Catral, M.; Lebtahi, L.; Stuart, J.; Thome, Néstor(Elsevier, 2020-08-01)
[EN] The {R, s +1, k}- and {R, s +1, k, *}-potent matrices have been studied in several recent papers. We continue these investigations from a spectral point of view. Specifically, a spectral study of {R, s + 1, k} -potent ...
Albanese, Angela; Bonet Solves, José Antonio; Ricker, Werner J.(Cambridge University Press, 2015)
[EN] An investigation is made of the continuity, the compactness and the spectrum of the Ces`aro operator C
when acting on the weighted Banach sequence spaces l_p(w), 1 < p < 1, for a positive decreasing weight
w, thereby ...
Fernández, Carmen; Galbis, Antonio; Jorda Mora, Enrique(Elsevier, 2020-05-13)
[EN] We study the spectrum of operators in the Schwartz space of rapidly decreasing functions which associate each function with its composition with a polynomial. In the case where this operator is mean ergodic we prove ...
Albanese, Angela; Bonet Solves, José Antonio; Ricker, W.(Theta Foundation, 2018)
[EN] A detailed investigation is made of the continuity, spectrum and mean ergodic properties of the Cesaro operator C when acting on the strong duals of power series spaces of infinite type. There is a dramatic difference ...
Albanese, Angela; Bonet Solves, José Antonio; Ricker, Werner J.(Springer-Verlag, 2018)
[EN] The spectrum of the CesA ro operator , which is always continuous (but never compact) when acting on the classical Korenblum space and other related weighted Fr,chet or (LB) spaces of analytic functions on the open ...
Albanese, Angela; Bonet Solves, José Antonio; Ricker, Werner J.(Institute of Mathematics, Polish Academy of Sciences, 2018)
[EN] The discrete Cesaro operator C is investigated in the class of power series spaces Lambda(0) (alpha) of finite type. Of main interest is its spectrum, which is distinctly different in the cases when Lambda(0) (alpha) ...
[EN] Unlike for l(p), 1 < p <= infinity, the discrete Cesaro operator C does not map l(1) into itself. We identify precisely those weights w such that C does map l(1)(w) continuously into itself. For these weights a complete ...
Bonet Solves, José Antonio(Springer-Verlag, 2019-10)
[EN] The continuity, compactness and the spectrum of the Volterra integral operator V-g with symbol an analytic function g, when acting on the classical Korenblum space and other related weighted Frechet or (LB) spaces of ...
Bonet Solves, José Antonio(Oxford University Press (OUP), 2015-06)
We investigate the spectrum of the Volterra operator Vg with symbol an entire
function g, when it acts on weighted Banach spaces H∞
v
(C) of entire functions with
sup-norms and when it acts on Hörmander algebras ...
Nuño Fernández, Luis(Universitat Politècnica de València, 2018-06-25)
Timbres of human voices and several musical instruments are analysed: wind (woodwind and brass) and electronic. For each of them, the envelope, waveform and spectrum are shown, and their main characteristics are described.
Nuño Fernández, Luis(Universitat Politècnica de València, 2018-06-25)
Timbres of several musical instruments are analysed: string (struck, bowed and plucked) and percussion (membranophones and idiophones). For each of them, the envelope, waveform and spectrum are shown, and their main ...
[EN] We investigate the continuity, compactness and invertibility of weighted composition operators W-psi,W-phi: f -> psi(f circle phi) when they act on the classical Korenblum space A(-infinity) and other related Frechet ...
Gomez Orts, Esther(Universitat Politècnica de València, 2022-05-30)
[ES] El objetivo de esta tesis es estudiar distintas propiedades de los operadores de composición ponderados en diferentes espacios ponderados de funciones analíticas.
Dado un peso v estrictamente positivo y continuo en ...