Author

K. Cools

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Preprint Aug 2026

Broadband Stable Calder\'on-Preconditioned Vector-Potential-Only Integral Equations for PEC Scattering

We propose a stabilized first-kind, Calder\'on preconditioned, vector-potential-only integral equation, for scattering at perfect electrical conductors. The method yields accurate low-frequency results for both the vector and the scalar potential, where the scalar potential is computed using the Lorenz gauge in the pos...

P. Olyslager, H. Rogier, K. Cools · 0 citations

Preprint Sep 2026

Quasi-Helmholtz Calder\'on Multiplicative Preconditioning for Higher-Order Global Multi-Trace Integral Equations

The paper presents a higher-order global multi-trace integral equation for time-harmonic electromagnetic scattering by composite objects. The higher-order multi-trace formulation is preconditioned with a Calder\'on multiplicative preconditioner using higher-order quasi-Helmholtz projectors. The higher-order quasi-Helmh...

Cedric Münger, A. Zuccotti, Van Chien Le et al. · 0 citations