After his appointment as Docent of Mathematics, he gave up his insurance job but did not resign his position as school teacher until he received a newly created full professorship at the university in 1926. Despite this heavy workload, it was between the years of 1922–25 that he developed what would become to be known as Nevanlinna theory.
After his appointment as Docent of Ma.thematics he gave up his insurance job but d.id not resign his position as school teacher until he received a newly created full professorship, at the university in 1926 Despite this heavy workload, it was between the years of 1922–25 that he developed what would become to be known as Nevanlinna theory