Browsing MAT_Articles by Title
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Wavelet-Based Entropy Measures to Characterize Two-Dimensional Fractional Brownian Fields
MDPI (2020-02-07)The aim of this work was to extend the results of Perez et al. (Physica A (2006), 365 (2), 282–288) to the two-dimensional (2D) fractional Brownian field. In particular, we defined Shannon entropy using the wavelet spectrum ... -
Weight-preserving isomorphisms between spaces of continuous functions: The scalar case
Elsevier (2016-01)Let F be a finite field (or discrete) and let A andBB be vector spaces of F-valued continuous functions defined on locally compact spaces X and Y , respectively. We look at the representation of linear bijections H:A⟶B ... -
Weighted composite likelihood-based tests for space-time separability of covariance functions
Springer US (2010)Testing for separability of space-time covariance functions is of great interest in the analysis of space-time data. In this paper we work in a parametric framework and consider the case when the parameter identifying the ... -
Well posedness for semidiscrete fractional Cauchy problems with finite delay
Elsevier (2017-08)We address the study of well posedness on Lebesgue spaces of sequences for the following fractional semidiscrete model with finite delay ∆ α u ( n ) = Tu ( n ) + β u ( n − τ ) + f ( n ) , n ∈ N , 0 < ... -
When a totally bounded group topology is the Bohr topology of a LCA group
Elsevier (2019-06-01)We look at the Bohr topology of maximally almost periodic groups (MAP, for short). Among other results, we investigate when a Hausdorff precompact abelian group (G; w) is the Bohr re ection of a locally compact abelian ... -
When the ground cover brings guests: is Anaphothrips obscurus a friend or a foe for the biological control of Tetranychus urticae in clementines?
Springer (2017-10)Biological control of Tetranychus urticae Koch (Acari: Tetranychidae), a key pest of clementines, can be improved in this crop with the establishment of a ground cover of Festuca arundinacea Schreber (Poaceae). This cover ... -
Which series are Hilbert series of graded modules over standard multigraded polynomial rings?
Wiley (2020)Consider a polynomial ring 𝑅� with the ℤ𝑛�-grading where the degree of each variableis a standard basis vector. In other words, 𝑅� is the homogeneous coordinate ring ofa product of 𝑛� projective spaces. In this setting, ... -
Written on stone: Engraved European medieval solar eclipses
Cambridge University Press (2019-12)In the context of the European Middle Ages as the period roughly covering from the 5th to the 15th centuries, the astronomical records are rarery found in scientific treatises. At least, not until the 15th century. A few ... -
δ-Sequences and Evaluation Codes de ned by Plane Valuations at Infinity
Oxford University Press (2008)We introduce the concept of δ-sequence. A δ-sequence ∆ generates a well-ordered semigroup S in Z2 or R. We show how to construct (and compute parameters) for the dual code of any evaluation code associated with a weight ... -
ℓp-Maximal regularity for a class of fractional difference equations on umd spaces: the case 1<α≤2
Duke University Press (2016-11)By using Blunck’s operator-valued Fourier multiplier theorem, we completely characterize the existence and uniqueness of solutions in Lebesgue sequence spaces for a discrete version of the Cauchy problem with fractional ...