Patrick Norman is Professor and Head of Theoretical Chemistry and Biology at KTH Royal Institute of Technology, Stockholm, Sweden. His research interests include response theory for non-resonant and resonant external fields in the UV/vis and X-ray regions. He is a co-author of the Dalton program. Kenneth Ruud is Professor of Theoretical Chemistry at the University of Tromso - The Arctic University of Norway.
His research interests include linear and nonlinear response theory for mixed electric and magnetic fields as well as vibrational and medium effects. He is a co-author of the Dalton program. Trond Saue is a directeur de recherché of the French National Center for Scientific Research (CNRS) working at Université Toulouse Ill-Paul Sabatier in France. His research focuses on relativistic methods in theoretical chemistry.
He is a principal author of the DIRAC program.