Carl Wilhelm Oseen

[2] He began practicing as a mathematics associate professor in 1902, and subsequently obtained his PhD a year afterward.

He visited Göttingen in the winter of 1900–01, where he attended David Hilbert's lectures on partial differential equations.

He was probably also influenced by the other famous mathematician in Göttingen, Felix Klein, and, on a later visit, by the hydrodynamicist Ludwig Prandtl.

The Basset–Boussinesq–Oseen (BBO) equation describes the motion of – and forces on – a particle moving in an unsteady flow at low Reynolds numbers.

As a full professor of a Swedish university, Oseen also had the right to nominate Nobel Prize winners.