Nikolai Grigor'evich Chudakov (1904–1986) was a Russia

Russia

Russia or , officially known as both Russia and the Russian Federation , is a country in northern Eurasia. It is a federal semi-presidential republic, comprising 83 federal subjects...

n and Soviet mathematician. He was born in Lysovsk, Novo-Burassk, Saratov

Saratov Oblast

Saratov Oblast is a federal subject of Russia , located in the Volga Federal District. Its administrative center is the city of Saratov. Population: -Demographics:Population:...

, Russian Empire

Russian Empire

The Russian Empire was a state that existed from 1721 until the Russian Revolution of 1917. It was the successor to the Tsardom of Russia and the predecessor of the Soviet Union...

. His father worked as a medical assistant.

He first studied at the Faculty of Physics and Mathematics at Saratov State University

Saratov State University

Saratov State University is a major higher education and research institution in Russia. Founded in 1909 as Imperial Saratov University, the university is located in the Volga River region in the city of Saratov...

, but then he transferred to Moscow University. He then graduated in 1927. In 1930, he was named head of higher mathematics at Saratov University. In 1936, he successfully defended his thesis

Thesis

A dissertation or thesis is a document submitted in support of candidature for an academic degree or professional qualification presenting the author's research and findings...

 and became a Doctor of Science

Doctor of Science

Doctor of Science , usually abbreviated Sc.D., D.Sc., S.D. or Dr.Sc., is an academic research degree awarded in a number of countries throughout the world. In some countries Doctor of Science is the name used for the standard doctorate in the sciences, elsewhere the Sc.D...

. Among others, he considerably improved a result from Guido Hoheisel

Guido Hoheisel

Guido Hoheisel was a German mathematician, a 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....

 and Hans Heilbronn

Hans Heilbronn

Hans Arnold Heilbronn was a mathematician.He was born into a German-Jewish family. He was a student at the universities of Berlin, Freiburg and Göttingen, where he met Edmund Landau, who supervised his doctorate...

 on an upper bound for prime gaps. He worked in Moscow

Moscow

Moscow is the capital, the most populous city, and the most populous federal subject of Russia. The city is a major political, economic, cultural, scientific, religious, financial, educational, and transportation centre of Russia and the continent...

until 1940, but then he reconnected with Saratov.