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Elsevier (North-Holland Publishing)
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ArticleDjellouli, RabiaA mixed-hybrid-type formulation is proposed for solving Helmholtz problems. This method is based on (a) a local approximation of the solution by oscillated finite element polynomials and (b) the use of Lagrange multipliers to “weakly” enforce the cont . . .
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ArticleSethuraman, BharathWe study components and dimensions of higher-order determinantal varieties obtained by considering generic m×n (m⩽n) matrices over rings of the form F[t]/(tk), and for some fixed r, setting the coefficients of powers of t of all r×r minors to zero. Th . . .
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ArticleSaint-Guirons, Anne-GaelleWe propose a new class of approximate local DtN boundary conditions to be applied on prolate spheroidal-shaped exterior boundaries when solving problems of acoustic scattering by elongated obstacles. These conditions are: (a) exact for the first modes . . .
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ArticleJonov, BoyanWe show in this paper that the principal component of the first-order jet scheme over the classical determinantal variety of m×n matrices of rank at most 1 is arithmetically Cohen–Macaulay, by showing that an associated Stanley–Reisner simplicial comp . . .
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ArticleReiner, Robert C.A mathematical and numerical analysis is performed to assess the performance of the second order Bayliss–Gunzburger–Turkel (BGT2) condition when applied to solving low-frequency acoustic scattering problems in the case of elongated scatterers. This in . . .
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ArticleGhoniem, Nasr M.Oxide dispersion strengthened (ODS) steels are promising candidates for applications in fusion and fission rectors. Y2O3 particles dispersed in an iron matrix drastically improve the strength without adverse effects on ductility. We investigate here d . . .
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ArticleSaint-Guirons, Anne-GaelleWe propose a new class of approximate local DtN boundary conditions to be applied on prolate spheroidal-shaped exterior boundaries when solving problems of acoustic scattering by elongated obstacles. These conditions are: (a) exact for the first modes . . .
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ArticleFreeman, Arthur J.First-principles electronic structure studies based on local spin density functional theory and performed on extremely complex simulations of ever increasingly realistic systems, play a very important role in explaining and predicting surface and inte . . .
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ArticleAmara, MohamedA mixed-hybrid-type formulation is proposed for solving Helmholtz problems. This method is based on (a) a local approximation of the solution by oscillated finite element polynomials and (b) the use of Lagrange multipliers to “weakly” enforce the cont . . .
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ArticleReiner, Robert C.A mathematical and numerical analysis is performed to assess the performance of the second order Bayliss–Gunzburger–Turkel (BGT2) condition when applied to solving low-frequency acoustic scattering problems in the case of elongated scatterers. This in . . .