Person: Young (6), Laurence Chisholm
Laurence Chisholm Young was a Germanborn mathematician who worked in measure theory, the calculus of variations, optimal control theory and potential theory.
Mathematical Profile (Excerpt):
 Laurence attended the Gymnasium in Lausanne and completed his studies two years early.
 It was a difficult period for Laurence, ready intellectually to be studying at university, but held back by the illness.
 Young was Isaac Newton Student at Cambridge in 1930, was awarded an MA in 1931 after studying with Fowler and Littlewood, and he was elected to a fellowship in 1931.
 Young first met Joan Elizabeth Mary Dunnett in 1927 when he was asked by Geoffrey Miller to come with him when he went to have tea with his cousin Elizabeth.
 Young remained at WisconsinMadison for the rest of his career, retiring in 1975 at the age of 70.
 In 1969 Young published Lectures on the calculus of variations and optimal control theory.
 This book is based on the theory of generalised curves, a topic which Young himself founded.
 Another important book written by Young was Mathematicians and their times: History of mathematics and mathematics of history published in 1981.
 This book is an outstanding one based on Young's reading of the original source material.
 The book also tells us a great deal about the way Young himself approached mathematics.
 Of course to read original sources requires a great knowledge of languages and this Young certainly possessed.
 After he retired, Young taught students at the University of Campinas in Brazil for many years.
Born 14 July 1905, Göttingen, Germany. Died 24 December 2000, Madison, Wisconsin, USA.
View full biography at MacTutor
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Origin Germany
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References
Adapted from other CC BYSA 4.0 Sources:
 O’Connor, John J; Robertson, Edmund F: MacTutor History of Mathematics Archive