2 http://hdl.handle.net/10338.dmlcz/140749 2 All-at-once preconditioning in PDE-constrained optimization http://hdl.handle.net/10338.dmlcz/140748 All-at-once preconditioning in PDE-constrained optimization Div-curl lemma revisited: Applications in electromagnetism http://hdl.handle.net/10338.dmlcz/140747 Div-curl lemma revisited: Applications in electromagnetism Hybrid parallelization of an adaptive finite element code http://hdl.handle.net/10338.dmlcz/140746 Hybrid parallelization of an adaptive finite element code Generic implementation of finite element methods in the Distributed and Unified Numerics Environment (DUNE) http://hdl.handle.net/10338.dmlcz/140745 Generic implementation of finite element methods in the Distributed and Unified Numerics Environment (DUNE)