Age, Biography and Wiki

D. H. Lehmer (Derrick Henry Lehmer) was born on 23 February, 1905 in Berkeley, California, is an American mathematician (1905-1991). Discover D. H. Lehmer's Biography, Age, Height, Physical Stats, Dating/Affairs, Family and career updates. Learn How rich is he in this year and how he spends money? Also learn how he earned most of networth at the age of 86 years old?

Popular As Derrick Henry Lehmer
Occupation N/A
Age 86 years old
Zodiac Sign Pisces
Born 23 February, 1905
Birthday 23 February
Birthplace Berkeley, California
Date of death 22 May, 1991
Died Place Berkeley, California
Nationality United States

We recommend you to check the complete list of Famous People born on 23 February. He is a member of famous mathematician with the age 86 years old group.

D. H. Lehmer Height, Weight & Measurements

At 86 years old, D. H. Lehmer height not available right now. We will update D. H. Lehmer's Height, weight, Body Measurements, Eye Color, Hair Color, Shoe & Dress size soon as possible.

Physical Status
Height Not Available
Weight Not Available
Body Measurements Not Available
Eye Color Not Available
Hair Color Not Available

Dating & Relationship status

He is currently single. He is not dating anyone. We don't have much information about He's past relationship and any previous engaged. According to our Database, He has no children.

Family
Parents Not Available
Wife Not Available
Sibling Not Available
Children Not Available

D. H. Lehmer Net Worth

His net worth has been growing significantly in 2023-2024. So, how much is D. H. Lehmer worth at the age of 86 years old? D. H. Lehmer’s income source is mostly from being a successful mathematician. He is from United States. We have estimated D. H. Lehmer's net worth, money, salary, income, and assets.

Net Worth in 2024 $1 Million - $5 Million
Salary in 2024 Under Review
Net Worth in 2023 Pending
Salary in 2023 Under Review
House Not Available
Cars Not Available
Source of Income mathematician

D. H. Lehmer Social Network

Instagram
Linkedin
Twitter
Facebook
Wikipedia
Imdb

Timeline

1905

Derrick Henry "Dick" Lehmer (February 23, 1905 – May 22, 1991), almost always cited as D.H. Lehmer, was an American mathematician significant to the development of computational number theory.

1928

During his studies at Berkeley, Lehmer met Emma Markovna Trotskaia, a Russian student of his father's, who had begun with work toward an engineering degree but had subsequently switched focus to mathematics, earning her B.A. in 1928.

Later that same year, Lehmer married Emma and, following a tour of Northern California and a trip to Japan to meet Emma's family, they moved by car to Providence, Rhode Island, after Brown University offered him an instructorship.

1929

Lehmer received a master's degree and a Ph.D., both from Brown University, in 1929 and 1930, respectively; his wife obtained a master's degree in 1930 as well, coaching mathematics to supplement the family income, while also helping her husband type his Ph.D. thesis, An Extended Theory of Lucas' Functions, which he wrote under Jacob Tamarkin.

1930

Lehmer refined Édouard Lucas' work in the 1930s and devised the Lucas–Lehmer test for Mersenne primes.

His peripatetic career as a number theorist, with him and his wife taking numerous types of work in the United States and abroad to support themselves during the Great Depression, fortuitously brought him into the center of research into early electronic computing.

Lehmer was born in Berkeley, California, to Derrick Norman Lehmer, a professor of mathematics at the University of California, Berkeley, and Clara Eunice Mitchell.

He studied physics and earned a bachelor's degree from UC Berkeley, and continued with graduate studies at the University of Chicago.

He and his father worked together on Lehmer sieves.

Lehmer became a National Research Fellow, allowing him to take positions at the California Institute of Technology from 1930 to 1931 and at Stanford University from 1931 to 1932.

In the latter year, the couple's first child Laura was born.

1932

After being awarded a second National Research Fellowship, the Lehmers moved on to Princeton, New Jersey between 1932 and 1934, where Dick spent a short time at the Institute for Advanced Study.

1934

He worked at Lehigh University in Pennsylvania from 1934 until 1938.

Their son Donald was born in 1934 while Dick and Emma were at Lehigh.

1938

The year 1938–1939 was spent in England on a Guggenheim Fellowship visiting both the University of Cambridge and the University of Manchester, meeting G. H. Hardy, John Edensor Littlewood, Harold Davenport, Kurt Mahler, Louis Mordell, and Paul Erdős.

The Lehmers returned to America by ship with second child Donald just before the beginning of the Battle of the Atlantic.

1939

Lehmer continued at Lehigh University for the 1939–1940 academic year.

1940

In 1940, Lehmer accepted a position back at the mathematics department of UC Berkeley.

1945

From 1945 to 1946, Lehmer served on the Computations Committee at Aberdeen Proving Grounds in Maryland, a group established as part of the Ballistics Research Laboratory to prepare the ENIAC for utilization following its completion at the University of Pennsylvania's Moore School of Electrical Engineering; the other Computations Committee members were Haskell Curry, Leland Cunningham, and Franz Alt.

It was during this short tenure that the Lehmers ran some of the first test programs on the ENIAC—according to their academic interests, these tests involved number theory, especially sieve methods, but also pseudorandom number generation.

When they could arrange child care, the Lehmers spent weekends staying up all night running such problems, the first over the Thanksgiving weekend of 1945.

1946

(Such tests were run without cost, since the ENIAC would have been left powered on anyway in the interest of minimizing vacuum tube failures.) The problem run during the 3-day Independence Day weekend of July 4, 1946, with John Mauchly serving as computer operator, ran around the clock without interruption or failure.

The following Tuesday, July 9, 1946, Lehmer delivered the talk "Computing Machines for Pure Mathematics" as part of the Moore School Lectures, in which he introduced computing as an experimental science, and demonstrated the wit and humor typical of his teaching lectures.

Lehmer would remain active in computing developments for the remainder of his career.

Upon his return to Berkeley, he made plans for building the California Digital Computer (CALDIC) with Paul Morton and Leland Cunningham.

1949

In September 1949, he presented the pseudorandom number generator now known as the Lehmer random number generator.

1950

In 1950, Lehmer was one of 31 University of California faculty fired after refusing to sign a loyalty oath, a policy initiated by the Board of Regents of the State of California in 1950 during the Communist scare personified by Senator Joseph McCarthy.

Lehmer took a post as Director of the National Bureau of Standards' Institute for Numerical Analysis (INA), working with the Standards Western Automatic Computer (SWAC).

1952

On October 17, 1952, the State Supreme Court proclaimed the oath unconstitutional, and Lehmer returned to Berkeley shortly thereafter.

Lehmer continued to be active for many years.

When John Selfridge was at Northern Illinois University he twice invited Lehmer and Emma to spend a semester there.

One year Selfridge arranged that Erdős and Lehmer taught a course together on Research Problems in the Theory of Numbers.

Lehmer taught the first eight weeks and then Erdős taught the remainder.

Erdős didn't often teach a course, and he said, "You know it wasn't that difficult. The only problem was being there."

Lehmer had quite a wit.

1954

Lehmer was chairman of the Department of Mathematics at University of California, Berkeley from 1954 until 1957.

1964

D. H. Lehmer wrote the article "The Machine Tools of Combinatorics," which is the first chapter in Edwin Beckenbach's Applied Combinatorial Mathematics (1964).

It describes methods for producing permutations, combinations, etc. This was a uniquely valuable resource and has only been rivaled recently by Volume 4 of Donald Knuth's series.

The Lehmers also assisted Harry Vandiver with his work on Fermat's Last Theorem, using the Standards Western Automatic Computer to do many calculations involving Bernoulli numbers.

1972

He continued working at UC Berkeley until 1972, the year he became professor emeritus.