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Author (up) Hiptmair, R.; Jerez-Hanckes, C.; Urzúa-Torres, C. doi  openurl
  Title Optimal Operator Preconditioning For Galerkin Boundary Element Methods On 3D Screens Type
  Year 2020 Publication SIAM Journal on Numerical Analysis Abbreviated Journal SIAM J. Numer. Anal.  
  Volume 58 Issue 1 Pages 834-857  
  Abstract We consider first-kind weakly singular and hypersingular boundary integral operators for the Laplacian on screens in $\mathbb{R}^{3}$ and their Galerkin discretization by means of low-order piecewise polynomial boundary elements. For the resulting linear systems of equations we propose novel Calderón-type preconditioners based on (i) new boundary integral operators, which provide the exact inverses of the weakly singular and hypersingular operators on flat disks, and (ii) stable duality pairings relying on dual meshes. On screens obtained as images of the unit disk under bi-Lipschitz transformations, this approach achieves condition numbers uniformly bounded in the meshwidth even on locally refined meshes. Comprehensive numerical tests also confirm its excellent preasymptotic performance.  
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  Language Summary Language Original Title  
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  Series Volume Series Issue Edition  
  ISSN 0036-1429 ISBN Medium  
  Area Expedition Conference  
  Notes Approved  
  Call Number UAI @ eduardo.moreno @ Serial 1011  
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