Results 1 to 10 of about 539 (137)

On various Riesz-dual sequences for Schauder frames [PDF]

open access: yesHeliyon, 2020
In this paper, we introduce various definitions of R-duals, to be called R-duals of type I, II, which leads to a generalization of the duality principle in Banach spaces.
Ali Reza Neisi, Mohammad Sadegh Asgari
doaj   +2 more sources

$K$-orthonormal and $K$-Riesz Bases [PDF]

open access: yesSahand Communications in Mathematical Analysis, 2021
Let $K$ be a bounded operator. $K$-frames are ordinary frames for the range $K$. These frames are a generalization of ordinary frames and are certainly different from these frames. This research introduces a new concept of bases for the range $K$.
Ahmad Ahmdi, Asghar Rahimi
doaj   +1 more source

Probabilistic logics based on Riesz spaces [PDF]

open access: yesLogical Methods in Computer Science, 2020
We introduce a novel real-valued endogenous logic for expressing properties of probabilistic transition systems called Riesz modal logic. The design of the syntax and semantics of this logic is directly inspired by the theory of Riesz spaces, a mature ...
Robert Furber, Radu Mardare, Matteo Mio
doaj   +1 more source

Finite element implementation of general triangular mesh for Riesz derivative

open access: yesPartial Differential Equations in Applied Mathematics, 2021
In this work, we will study a calculation method of variation formula with Riesz fractional derivative. As far as we know, Riesz derivative is a non-local operator including 2ndirections in n−dimension space, which the difficulties for computation of ...
Daopeng Yin, Liquan Mei
doaj   +1 more source

Non-Parametric Regression and Riesz Estimators

open access: yesAxioms, 2023
In this paper, we consider a non-parametric regression model relying on Riesz estimators. This linear regression model is similar to the usual linear regression model since they both rely on projection operators.
Christos Kountzakis   +1 more
doaj   +1 more source

Biframes and some of their properties

open access: yesJournal of Inequalities and Applications, 2022
Recently, frame multipliers, pair frames, and controlled frames have been investigated to improve the numerical efficiency of iterative algorithms for inverting the frame operator and other applications of frames. In this paper, the concept of biframe is
Maryam Firouzi Parizi   +2 more
doaj   +1 more source

Binary Operations in Metric Spaces Satisfying Side Inequalities

open access: yesMathematics, 2021
The theory of metric spaces is a convenient and very powerful way of examining the behavior of numerous mathematical models. In a previous paper, a new operation between functions on a compact real interval called fractal convolution has been introduced.
María A. Navascués   +2 more
doaj   +1 more source

Strong summability methods in a Riesz-type family; pp. 238–250 [PDF]

open access: yesProceedings of the Estonian Academy of Sciences, 2011
We continue our studies on Riesz-type families of summability methods for functions and sequences, started in (Proc. Estonian Acad. Sci., 2008, 57, 70–80) and (Math. Model. Anal., 2010, 15, 103–112). Strong summability methods defined on the basis of
Anna Šeletski, Anne Tali
doaj   +1 more source

Decomposition of A Fuzzy Function By One-Dimensional Fuzzy Multiresolution Analysis

open access: yesJournal of Computing Research and Innovation, 2023
Signal compression and data compression are techniques for storing and transmitting signals using fewer bits as possible for encoding a complete signal. A good signal compression scheme requires a good signal decomposition scheme.
Jean-louis Akakatshi Ossako   +3 more
doaj   +3 more sources

Binary basic splines in MRA [PDF]

open access: yesИзвестия Саратовского университета. Новая серия: Математика. Механика. Информатика, 2021
$B$-splines were introduced by Carry and Schoenberg. Constructed on a uniform mesh and defined in terms of convolutions, such splines generate a Riesz MRA.
Chumachenko, Sergei A.
doaj   +1 more source

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