Trygve Helgaker
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Trygve Helgaker was born August 11, 1953 in Porsgrunn, Norway. He is Professor of Chemistry, Department of Chemistry, University of Oslo, Norway.
He is a member of the International Academy of Quantum Molecular Science, 2005.
He has written more than 200 scientific papers, and the book, "Molecular Electronic-Structure Theory" Trygve Helgaker, Poul Jørgensen and Jeppe Olsen, Wiley, Chichester, 2000. He is one of the main authors of the DALTON program.