Christopher Longuet-Higgins

Also known as Hugh Christopher Longuet-Higgins

Christopher Longuet-Higgins was a theoretical chemist and cognitive scientist whose AI work ranged from computer vision to language, music and neural-network research. He studied chemistry and music at Balliol College, proposed a structure for diborane, and later held professorships at King's College London and Cambridge. In Edinburgh, he helped establish machine-intelligence research, named the wider field cognitive science in 1973, and worked with his students on language, visual perception, music and neural-network memory. At Sussex, he continued AI research on visual depth and directed an interdisciplinary institute; in 1981 he introduced the essential matrix to computer vision. He became a Fellow of the Royal Society in 1958 and died in 2004.

Works: 226
Citations: 20,981
h-index: 62
Badges: Loyal
Pioneer

Publication numbers from OpenAlex, as of 19 October 2026.

Timeline

1923–1945

Chemistry and music at Oxford

Born in Lenham in 1923, he wins a Balliol College scholarship in 1941 to read chemistry. At Oxford, he also studies music and becomes an organ scholar. In 1943, he publishes with his tutor R. P. Bell a paper proposing the structure of diborane; he graduates with first-class honours in 1945.
1952–1967

Chemistry and physics professorships

After Oxford, he spends time in Chicago and Manchester before becoming professor of theoretical physics at King's College London in 1952. In 1954, he becomes John Humphrey Plummer Professor of Theoretical Chemistry at Cambridge and holds the chair through 1967. His research uses quantum and statistical mechanics to study molecular structure and spectroscopy.
1958

A Royal Society fellowship

He becomes a Fellow of the Royal Society in 1958.
1967–1973

Artificial intelligence in Edinburgh

In 1967, he moves from Cambridge to Edinburgh and co-founds the Department of Machine Intelligence and Perception with Richard Gregory and Donald Michie. He and his students work on language production, music perception, binocular vision and memory stored in neural networks; in 1973, he coins the term “cognitive science.”
1974

AI research at Sussex

In 1974, he transfers his Royal Society Fellowship to Sussex University and joins the Experimental Psychology Group in the School of Biological Sciences. He continues AI research on how the brain analyses depth and distance in visual-image sequences.
1981

The essential matrix

In 1981, he introduces the essential matrix to computer vision.
1984–1986

Directing a Sussex institute

From 1984 to 1986, he directs Sussex's Institute of Cognitive and Information Sciences, which aims to bring together computer engineering, computer science, linguistics and experimental psychology.
1988–2004

Retirement and death

He retires in 1988 and works on generating a musical performance automatically from a score. He dies in 2004.

Career

1974–1986University of SussexResearcher, Director
1967–1973University of EdinburghCo-founder
1954–1967University of CambridgeJohn Humphrey Plummer Professor of Theoretical Chemistry
1952–1954King's College LondonProfessor of Theoretical Physics
1950–1955University of Manchester