Heini Halberstam (11 September 1926 – 25 January 2014) was a Czech-born British mathematician, working in the field of

analytic number theory In mathematics, analytic number theory is a branch of number theory that uses methods from mathematical analysis to solve problems about the integers. It is often said to have begun with Peter Gustav Lejeune Dirichlet's 1837 introduction of Dir ...

. He is remembered in part for the Elliott–Halberstam conjecture from 1968.

Life and career

Halberstam was born in Most,

Czechoslovakia Czechoslovakia ( ; Czech language, Czech and , ''Česko-Slovensko'') was a landlocked country in Central Europe, created in 1918, when it declared its independence from Austria-Hungary. In 1938, after the Munich Agreement, the Sudetenland beca ...

and died in

Champaign, Illinois Champaign ( ) is a city in Champaign County, Illinois, United States. The population was 88,302 at the 2020 census. It is the List of municipalities in Illinois, tenth-most populous municipality in Illinois and the fourth most populous city in ...

, US. His father died when he was very young. After

Adolf Hitler Adolf Hitler (20 April 1889 – 30 April 1945) was an Austrian-born German politician who was the dictator of Nazi Germany from 1933 until Death of Adolf Hitler, his suicide in 1945. Adolf Hitler's rise to power, He rose to power as the lea ...

's annexation of the

Sudetenland The Sudetenland ( , ; Czech and ) is a German name for the northern, southern, and western areas of former Czechoslovakia which were inhabited primarily by Sudeten Germans. These German speakers had predominated in the border districts of Bohe ...

, he and his mother moved to

Prague Prague ( ; ) is the capital and List of cities and towns in the Czech Republic, largest city of the Czech Republic and the historical capital of Bohemia. Prague, located on the Vltava River, has a population of about 1.4 million, while its P ...

. At the age of twelve, as the

Nazi Nazism (), formally named National Socialism (NS; , ), is the far-right politics, far-right Totalitarianism, totalitarian socio-political ideology and practices associated with Adolf Hitler and the Nazi Party (NSDAP) in Germany. During H ...

occupation progressed, he was one of the 669 children saved by Sir

Nicholas Winton Sir Nicholas George Winton (; 19 May 1909 – 1 July 2015) was a British stockbroker and humanitarian who helped to rescue refugee children, mostly Jews, Jewish, whose families had fled persecution by Nazi Germany. Born to History of the Jews ...

, who organized the

Kindertransport The ''Kindertransport'' (German for "children's transport") was an organised rescue effort of children from Nazi Nazism (), formally named National Socialism (NS; , ), is the far-right politics, far-right Totalitarianism, total ...

, a train that allowed those children to leave Nazi-occupied territory. He was sent to England, where he lived during

World War II World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...

. He obtained his PhD in 1952, from University College, London, under the supervision of Theodor Estermann. From 1962 until 1964, Halberstam was Erasmus Smith's Professor of Mathematics at Trinity College Dublin; From 1964 until 1980, Halberstam was a Professor of Mathematics at the

University of Nottingham The University of Nottingham is a public research university in Nottingham, England. It was founded as University College Nottingham in 1881, and was granted a royal charter in 1948. Nottingham's main campus (University Park Campus, Nottingh ...

. In 1980, he took up a position at the

University of Illinois Urbana-Champaign The University of Illinois Urbana-Champaign (UIUC, U of I, Illinois, or University of Illinois) is a public university, public land-grant university, land-grant research university in the Champaign–Urbana metropolitan area, Illinois, United ...

(UIUC) and became an Emeritus Professor at UIUC in 1996. In 2012, he became a fellow of the

American Mathematical Society The American Mathematical Society (AMS) is an association of professional mathematicians dedicated to the interests of mathematical research and scholarship, and serves the national and international community through its publications, meetings, ...

. He is known also for books, ''

Sequences In mathematics, a sequence is an enumerated collection of objects in which repetitions are allowed and order matters. Like a set, it contains members (also called ''elements'', or ''terms''). The number of elements (possibly infinite) is call ...

'' with Klaus Roth on

additive number theory Additive number theory is the subfield of number theory concerning the study of subsets of integers and their behavior under addition. More abstractly, the field of additive number theory includes the study of abelian groups and commutative semigro ...

, and with H. E. Richert on

sieve theory Sieve theory is a set of general techniques in number theory, designed to count, or more realistically to estimate the size of, sifted sets of integers. The prototypical example of a sifted set is the set of prime numbers up to some prescribed limi ...

References

1926 births 2014 deaths 20th-century English mathematicians 21st-century English mathematicians Czech Jews British number theorists Academics of the University of Nottingham Fellows of the American Mathematical Society Kindertransport refugees University of Illinois Urbana-Champaign faculty Alumni of University College London Donegall Lecturers of Mathematics at Trinity College Dublin People from Most (city) University of Illinois faculty English emigrants to the United States Czechoslovak emigrants to England {{UK-mathematician-stub