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 (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 ...
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 ...
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 ...
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, ...
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 ...
[ES] La gran complejidad sonora del piano reside en la gran cantidad de componentes acústicos
que afectan a la propagación del sonido dentro del instrumento y su posterior radiación. La
manera en que el pianista ataca ...
This paper examines matrices A is an element of C-nxn such that RA = A(s+1) R where R-k = I, the identity matrix, and where sand k are nonnegative integers with k >= 2. Spectral theory is used to characterize these matrices. ...
[EN] We investigate partial orders on the set of complex square matrices and introduce a new order relation based on spectrally orthogonal matrix decompositions. We also establish the relation of this concept with the known ...
[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 ...
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 ...
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) ...
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 ...
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.
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 ...