Background
He was born in Malmöhus County, now Skåne County, in southern Sweden and became a student at the nearby University of Lund in 1861.
mathematician physicist university professor
He was born in Malmöhus County, now Skåne County, in southern Sweden and became a student at the nearby University of Lund in 1861.
In 1864 he started to work for the observatory, and received his Doctor of Philosophy in 1868 working on methods to obtain the latitude of a place by astronomical observations.
He was a professor at Lund University and its rector from 1907 to 1909. He was awarded the title of associate professor in Mechanics and Mathematical Physics in 1878, and elected Fellow of the Swedish Academy of Science in 1888. In 1897 he became a full professor
In 1874 he was awarded a travel grant to study abroad for six months.
He went to the universities at Leipzig and Erlangen to work with Felix Klein and Ferdinand von Lindemann. His most important work was in the field of transformations pioneered by Sophus Lie.
He improved greatly the understanding of contact transformations and introduced a new second class transformation, now known as auto-Bäcklund transformation.
Royal Swedish Academy of Sciences.