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On the Construction of Group Equivariant Non-Expansive Operators via Permutants and Symmetric Functions

open access: yesFrontiers in Artificial Intelligence, 2022
Group Equivariant Operators (GEOs) are a fundamental tool in the research on neural networks, since they make available a new kind of geometric knowledge engineering for deep learning, which can exploit symmetries in artificial intelligence and reduce ...
Francesco Conti   +7 more
doaj   +1 more source

New Inequalities and Generalizations for Symmetric Means Induced by Majorization Theory

open access: yesAxioms, 2022
In this paper, the authors study new inequalities and generalizations for symmetric means and give new proofs for some known results by applying majorization theory.
Huan-Nan Shi, Wei-Shih Du
doaj   +1 more source

Invariants in Non-Commutative Variables of the Symmetric and Hyperoctahedral Groups [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2008
We consider the graded Hopf algebra $NCSym$ of symmetric functions with non-commutative variables, which is analogous to the algebra $Sym$ of the ordinary symmetric functions in commutative variables.
Anouk Bergeron-Brlek
doaj   +1 more source

Weakly symmetric functions on spaces of Lebesgue integrable functions

open access: yesKarpatsʹkì Matematičnì Publìkacìï, 2022
In this work, we present the notion of a weakly symmetric function. We show that the subset of all weakly symmetric elements of an arbitrary vector space of functions is a vector space.
T.V. Vasylyshyn, V.A. Zahorodniuk
doaj   +1 more source

Hopf algebras and the logarithm of the S-transform in free probability ― Extended abstract [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2009
This document is an extended abstract of the paper `Hopf algebras and the logarithm of the S-transform in free probability' in which we introduce a Hopf algebraic approach to the study of the operation $\boxtimes$ (free multiplicative convolution) from ...
Mitja Mastnak, Alexandru Nica
doaj   +1 more source

A Symmetric Function of Increasing Forests

open access: yesForum of Mathematics, Sigma, 2021
For an indifference graph G, we define a symmetric function of increasing spanning forests of G. We prove that this symmetric function satisfies certain linear relations, which are also satisfied by the chromatic quasisymmetric function and unicellular $\
Alex Abreu, Antonio Nigro
doaj   +1 more source

Decomposing Bivariate Symmetric Density Function into Three Symmetric Structures. [PDF]

open access: yesThe Egyptian Statistical Journal, 1997
Tomizawa, Seo and Minaguchi (1996) gave a decomposition of bivariate symmetric density function. This note gives another decomposition. It is shown that the density function is symmetric if and only if it is quasi-symmetric, conditional marginal ...
Sadao Tomizawa, Tomono Konuma
doaj   +1 more source

Topology on the spectrum of the algebra of entire symmetric functions of bounded type on the complex $L_\infty$

open access: yesKarpatsʹkì Matematičnì Publìkacìï, 2017
It is known that the so-called elementary symmetric polynomials $R_n(x) = \int_{[0,1]}(x(t))^n\,dt$ form an algebraic basis in the algebra of all symmetric continuous polynomials on the complex Banach space $L_\infty,$ which is dense in the Fr\'{e}chet ...
T.V. Vasylyshyn
doaj   +1 more source

Scheduling Problems and Generalized Graph Coloring [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2020
We define a new type of vertex coloring which generalizes vertex coloring in graphs, hypergraphs, andsimplicial complexes. To this coloring there is an associated symmetric function in noncommuting variables for whichwe give a deletion-contraction ...
John Machacek
doaj   +1 more source

Higher order symmetric duality for multiobjective fractional programming problems over cones [PDF]

open access: yesYugoslav Journal of Operations Research, 2022
This article studies a pair of higher order nondifferentiable symmetric fractional programming problem over cones. First, higher order cone convex function is introduced.
Kaur Arshpreet, Sharma Mahesh Kumar
doaj   +1 more source

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