Results 21 to 30 of about 1,336,490 (306)

A COMPUTATION PERSPECTIVE FOR THE EIGENVALUES OF CIRCULANT MATRICES INVOLVING GEOMETRIC PROGRESSION

open access: yesJurnal Matematika UNAND, 2023
In this article, the eigenvalues and inverse of circulant matrices with entries in the first row having the form of a geometric sequence are formulated explicitly in a simple form in one theorem. The method for deriving the formulation of the determinant
SISWANDI SISWANDI   +3 more
doaj   +1 more source

Approximation of Bayesian inverse problems for PDEs [PDF]

open access: yes, 2010
Inverse problems are often ill posed, with solutions that depend sensitively on data. In any numerical approach to the solution of such problems, regularization of some form is needed to counteract the resulting instability.
Dashti, Massoumeh   +6 more
core   +1 more source

Uniqueness result for a fractional diffusion coefficient identification problem

open access: yesBoundary Value Problems, 2019
In this paper, we establish an identifiability result for the coefficient identification problem in a fractional diffusion equation in a bounded domain from the observation of the Cauchy data on particular subsets of the boundary.
Fadhel Jday, Ridha Mdimagh
doaj   +1 more source

Inverse privacy

open access: yesCommunications of the ACM, 2016
Seeking a market-based solution to the problem of a person's unjustified inaccessibility to their private information.
Yuri Gurevich   +2 more
openaire   +3 more sources

Inverse medium problem for a singular contrast [PDF]

open access: yes, 2019
We consider an inverse medium problem in two- and three-dimensional cases. Namely, we investigate the problem of reconstruction of unknown compactly supported refractive index (contrast) from L-2 with a fixed positive wave number.
T. Tyni, Serov, V., Tyni, T., V. Serov
core   +1 more source

Feedback methods for inverse simulation of dynamic models for engineering systems applications [PDF]

open access: yes, 2011
Inverse simulation is a form of inverse modelling in which computer simulation methods are used to find the time histories of input variables that, for a given model, match a set of required output responses.
David J. Murray-Smith   +1 more
core   +1 more source

Fourier Inversion for Finite Inverse Semigroups [PDF]

open access: yesSIAM Journal on Discrete Mathematics, 2015
This paper continues the study of Fourier transforms on finite inverse semigroups, with a focus on Fourier inversion theorems and FFTs for new classes of inverse semigroups. We begin by introducing four inverse semigroup generalizations of the Fourier inversion theorem for finite groups.
openaire   +4 more sources

Mathematical Formulation of Dmh-Based Inverse Optimization

open access: yesFrontiers in Oncology, 2014
Purpose: To introduce the concept of dose-mass based inverse optimization for radiotherapy applications.Materials and Methods: Mathematical derivation of the dose-mass based formalism is presented. This mathematical representation is compared to the most
Ivaylo eMihaylov, Eduardo eMoros
doaj   +1 more source

Super Fuzzy Matrix of Inverse in kth Order

open access: yesRatio Mathematica, 2023
Unexpected event modelling is a affluent area of study in fuzzy matrix (FM) modelling. Every fuzzy matrix may be shown as a multidimensional cocept, but standard matrices cannot achieve this without the proper scale.
R. Deepa, Dr. P. Sundararajan
doaj   +1 more source

Explicit determinants, inverses and eigenvalues of four band Toeplitz matrices with perturbed rows

open access: yesSpecial Matrices, 2019
In this paper, four-band Toeplitz matrices and four-band Hankel matrices of type I and type II with perturbed rows are introduced. Explicit determinants, inverses and eigenvalues for these matrices are derived by using a nice inverse formula of block ...
Zhang Maoyun   +2 more
doaj   +1 more source

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