Famous Birthdays·June 18·Andrew Forsyth
Andrew Forsyth

GBAndrew Forsyth

A mathematician whose monumental textbook on complex functions shaped the education of a generation of British analysts.

1858–1942 (age 84)·19th and 20th-century British mathematician·Birthday: June 18

Photo: no coneguts · Public domain

Biography

Andrew Forsyth emerged from the rigorous mathematical culture of late Victorian Britain, carving a path that would influence the field for decades. As a student at Trinity College, Cambridge, he fell under the spell of the theory of functions, a passion that defined his career. His magnum opus, 'Theory of Functions of a Complex Variable', was not merely a book but a sprawling, six-volume landscape that attempted to map the entire territory of the subject. Its sheer ambition and encyclopedic scope made it a standard reference, though its density also earned it a reputation for being formidable. Forsyth held prestigious chairs, first at Liverpool and then at Imperial College London, before succeeding the great George Stokes at Cambridge. His later years were marked by a controversial and ultimately unsuccessful attempt to develop a new theory of differential equations, a project that consumed him but left his legacy firmly anchored in that earlier, monumental work.

#1 When Andrew Was Born

The biggest hits of 1858

Andrew's Life & Times

The world at every milestone

1858Born
1863Started school
President: Abraham Lincoln
1871Became a teenager
President: Ulysses S. Grant
1874Could drive
President: Ulysses S. Grant
1876Could vote
President: Ulysses S. Grant
1879Turned 21
President: Rutherford B. Hayes
1888Turned 30
President: Grover Cleveland
1898Turned 40

Spanish-American War; US emerges as a world power

President: William McKinley
1908Turned 50

Ford Model T goes into production

President: Theodore Roosevelt
1918Turned 60

World War I ends; Spanish flu pandemic kills millions

President: Woodrow Wilson
1928Turned 70

Alexander Fleming discovers penicillin; Mickey Mouse debuts

President: Calvin Coolidge"Ol' Man River" — Paul WhitemanBest Picture: Wings
1938Turned 80

Kristallnacht and the escalation toward WWII

Gas: $0.20/galHome: $2,850Min wage: $0.25/hrPresident: Franklin D. Roosevelt"Begin the Beguine" — Artie ShawBest Picture: You Can't Take It with You
1942Died at 84

Battle of Midway turns the tide in the Pacific

Gas: $0.20/galHome: $3,175Min wage: $0.30/hrPresident: Franklin D. Roosevelt"White Christmas" — Bing CrosbyBest Picture: Mrs. Miniver

Key Achievements

  • Authored the influential and comprehensive six-volume textbook 'Theory of Functions of a Complex Variable'.
  • Served as the Sadleirian Professor of Pure Mathematics at the University of Cambridge from 1895 to 1910.
  • Was elected a Fellow of the Royal Society (FRS) in recognition of his contributions to mathematical analysis.

Did You Know?

He was a notable 'Apostle', a member of the Cambridge Conversazione Society, an elite secret debating club.

His massive textbook was famously difficult; a contemporary mathematician joked that reviewing it would be 'like reviewing the Alps'.

He resigned his Cambridge chair in 1910 to get married, as the position required fellows to remain unmarried at the time.

“The theory of functions is the true life of mathematics.”

— Andrew Forsyth

Also Born on June 18

See all 100 famous birthdays →

Barack Obama Sr.

Barack Obama Sr.

1934

Carol Kane

Carol Kane

1952

Alison Moyet

Alison Moyet

1961

Alex Hirsch

Alex Hirsch

1985

B

Barry Evans (actor)

1943

Bruiser Brody

Bruiser Brody

1946

Barbara Broccoli

Barbara Broccoli

1960

Brian Benben

Brian Benben

1956

Antonio Gates

Antonio Gates

1980

Bruce Smith

Bruce Smith

1963

Andrés Galarraga

Andrés Galarraga

1961

Chris Van Allsburg

Chris Van Allsburg

1949

AboutPrivacyTermsContact

© 2026 oresth.com