IETI - Isogeometric Tearing and Interconnecting

► A new IsogEometric Tearing and Interconnecting (IETI) method is proposed. ► Exact geometry representation of IGA and solver design of FETI methods are combined. ► Coupling conditions for interfaces, including hanging knots, are discussed. ► Efficient preconditioning techniques for the interface problem are presented. ► Some local refinement options for IGA are discussed.