Homogenisation of Laminated Metamaterials and the Inner Spectrum (Paperback)

Lingua: inglese

Editore: Springer Nature Switzerland AG, Cham, 2025

3032019303 / 9783032019301

Da: Grand Eagle Retail, Bensenville, IL, U.S.A.Grand Eagle Retail

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Paperback. This book investigates homogenisation problems for divergence form equations with rapidly sign-changing coefficients. Focusing on problems with piecewise constant, scalar coefficients in a (d-dimensional) crosswalk type shape, we will provide a limit procedure in order to understand potentially ill-posed and non-coercive settings.Depending on the integral mean of the coefficient and its inverse, the limits can either satisfy the usual homogenisation formula for stratified media, be entirely degenerate or be a non-local differential operator of 4th order. In order to mark the drastic change of nature, we introduce the inner spectrum for conductivities. We show that even though 0 is contained in the inner spectrum for all strictly positive periods, the limit inner spectrum can be empty. Furthermore, even though the spectrum was confined in a bounded set uniformly for all strictly positive periods and not containing 0, the limit inner spectrum might have 0 as an essential spectral point and accumulate at or even be the whole of C. This is in stark contrast to the classical situation, where it is possible to derive upper and lower bounds in terms of the values assumed by the coefficients in the pre-asymptotics.Along the way, we also develop a theory for SturmLiouville type operators with indefinite weights, reduce the question on solvability of the associated SturmLiouville operator to understanding zeros of a certain explicit polynomial and show that generic real perturbations of piecewise constant coefficients lead to continuously invertible SturmLiouville expressions. Furthermore, even though the spectrum was confined in a bounded set uniformly for all strictly positive periods and not containing 0, the limit inner spectrum might have 0 as an essential spectral point and accumulate at or even be the whole of C. Shipping may be from multiple locations in the US or from the UK, depending on stock availability.…

Codice articolo 9783032019301

Titolo
Homogenisation of Laminated Metamaterials and the Inner Spectrum (Paperback)
Autore
Marcus Waurick
Editore
Springer Nature Switzerland AG, Cham
Anno di pubblicazione
2025
Condizione
new
Rilegatura
Paperback
Lingua
inglese
ISBN 10
3032019303
ISBN 13
9783032019301

Grand Eagle Retail

Bensenville, IL, U.S.A.

Venditore con 5 stelle

Venditore AbeBooks dal 12 ottobre 2005

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