William Henry Young
Encyclopedia
William Henry Young was an English
English people
The English are a nation and ethnic group native to England, who speak English. The English identity is of early mediaeval origin, when they were known in Old English as the Anglecynn. England is now a country of the United Kingdom, and the majority of English people in England are British Citizens...

mathematician. Young was educated at City of London School
City of London School
The City of London School is a boys' independent day school on the banks of the River Thames in the City of London, England. It is the brother school of the City of London School for Girls and the co-educational City of London Freemen's School...

 and Peterhouse, Cambridge
Peterhouse, Cambridge
Peterhouse is a constituent college of the University of Cambridge, England. It is the oldest college of the University, having been founded in 1284 by Hugo de Balsham, Bishop of Ely...

. He worked on measure theory, Fourier series
Fourier series
In mathematics, a Fourier series decomposes periodic functions or periodic signals into the sum of a set of simple oscillating functions, namely sines and cosines...

, differential calculus
Differential calculus
In mathematics, differential calculus is a subfield of calculus concerned with the study of the rates at which quantities change. It is one of the two traditional divisions of calculus, the other being integral calculus....

 amongst other fields, and made brilliant and long-lasting contributions to the study of functions of several complex variables. He was the husband of Grace Chisholm Young
Grace Chisholm Young
Grace Chisholm Young was an English mathematician. She was educated at Girton College, Cambridge, England and continued her studies at Göttingen University in Germany, where in 1895 she became the first woman to receive a doctorate in any field in that country...

 and father of Laurence Chisholm Young
Laurence Chisholm Young
Laurence Chisholm Young was a mathematician known for his contributions to measure theory, the calculus of variations, optimal control theory, and potential theory...

.

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