New hierarchical basis and Calderón preconditioners for the electric and the combined field integral equation are presented. The new hierarchical basis operates on structured and unstructured meshes and yields a condition number of the system matrix that grows only logarithmically in the number of unknowns. The new Calderón preconditioner, different from the Calderón multiplicative preconditioner, does not require a barycentrically refined mesh. What is more, a Hermitian and positive definite system matrix is obtained.
«New hierarchical basis and Calderón preconditioners for the electric and the combined field integral equation are presented. The new hierarchical basis operates on structured and unstructured meshes and yields a condition number of the system matrix that grows only logarithmically in the number of unknowns. The new Calderón preconditioner, different from the Calderón multiplicative preconditioner, does not require a barycentrically refined mesh. What is more, a Hermitian and positive definite sy...
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