A deflation-based preconditioner is proposed to robustly handle ill-conditioned systems arising from small cut elements in immersed finite element methods.
H¨ ollig, Finite element methods with B-splines, SIAM, 2003
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Deflation-based preconditioning for immersed finite element methods and immersogeometric analysis
A deflation-based preconditioner is proposed to robustly handle ill-conditioned systems arising from small cut elements in immersed finite element methods.