J.L. holds since 2013 a position as Professor of Physics at the Norwegian University of Science and Technology. His research is focused on theoretical quantum condensed matter physics and he has received several prizes for his Ph.D work on the interplay between superconductivity and magnetism. He has also received the American Physical Society ”Outstanding Referee” award, selected among over 60.000 active referees. In teaching courses such as Classical Mechanics and Particle Physics for both undergraduate and graduate students, he has invariably received high scores from the students for his pedagogical qualities and lectures. His webpage is found here.

I.B. has for about 20 years been a Professor of Mechanics at the Norwegian University of Science and Technology. He has worked within electrodynamics, fluid mechanics, and cosmology, and has alone or with co-authors published about 250 research papers in international journals. He was a member of the Editorial Board of Physical Review E, in the period 2009-2014, and was awarded the American Physical Society’s ”Outstanding Referee”, at their first round in 2008. The present book actually grew out from a course of lectures given by him on Classical Mechanics at the university during a period of about 15 years. His webpage is found here.