Guido Hoheisel

Guido Karl Heinrich Hoheisel (14 July 1894 – 11 October 1968) was a German mathematician and professor of mathematics at the University of Cologne.

He did his PhD in 1920 from the University of Berlin under the supervision of Erhard Schmidt.

[1] During World War II Hoheisel was required to teach classes simultaneously at three universities, in Cologne, Bonn, and Münster.

Hoheisel contributed to the journal Deutsche Mathematik.

Hoheisel is known for a result on gaps between prime numbers:[3] He proved that if π(x) denotes the prime-counting function, then there exists a constant θ < 1 such that as x tends to infinity, implying that if pn denotes the n-th prime number then for all sufficiently large n. He showed that one may take with (03) denoting periodic repetition.