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Cuthbert Edmund Cullis (15 April 1868 – 20 March 1954) was an English mathematician who worked as a professor of mathematics at the
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{{DEFAULTSORT:Cullis, Cuthbert Edmund 1868 births 1954 deaths Academic staff of the University of Calcutta Alumni of the University of Cambridge English mathematicians
Cuthbert Edmund Cullis (15 April 1868 – 20 March 1954) was an English mathematician who worked as a professor of mathematics at the University of Calcutta
The University of Calcutta, informally known as Calcutta University (), is a Public university, public State university (India), state university located in Kolkata, Calcutta (Kolkata), West Bengal, India. It has 151 affiliated undergraduate c ...
and was influential in standardizing notation and conventions in the algebra of matrices and determinants.
Life and work
Cullis was the son of Frederick John, a dock surveyor inGloucester
Gloucester ( ) is a cathedral city, non-metropolitan district and the county town of Gloucestershire in the South West England, South West of England. Gloucester lies on the River Severn, between the Cotswolds to the east and the Forest of Dean ...
and Louisa (née Corbett) Cullis. One of his two sisters, Winifred C. Cullis, became a physiologist. He was educated at King Edward High School, Birmingham after which he joined Caius College, Cambridge
Gonville and Caius College, commonly known as Caius ( ), is a constituent college of the University of Cambridge in Cambridge, England. Founded in 1348 by Edmund Gonville, it is the fourth-oldest of the University of Cambridge's 31 colleges an ...
. After being seventh wrangler in 1891 he went to Jena
Jena (; ) is a List of cities and towns in Germany, city in Germany and the second largest city in Thuringia. Together with the nearby cities of Erfurt and Weimar, it forms the central metropolitan area of Thuringia with approximately 500,000 in ...
, Germany and received a doctorate under Carl Johannes Thomae with a thesis titled ''Die Bewegung Durchlöcherter Körper in einer Inkompressiblen Flüssigkeit''. He became a lecturer at Hartley College and moved to the University of Calcutta
The University of Calcutta, informally known as Calcutta University (), is a Public university, public State university (India), state university located in Kolkata, Calcutta (Kolkata), West Bengal, India. It has 151 affiliated undergraduate c ...
in 1910 where he served as Hardinge Professor of Mathematics until his retirement in 1925.
Cullis published extensively in the Bulletin of the Calcutta Mathematical Society and among his contribution was the work demonstrating that the Moebius ring was a section of the cubic surface defined by:
y(x2+y2+z2-a2)-2z(x2+y2+ax)=0
His most important work was ''Matrices and Determinoids'' (1913-1925) to be published in three volumes although only two volumes and a part of the third volume were finally published. He defined what is now called the Cullis-Radić determinant
In mathematics, the determinant is a Scalar (mathematics), scalar-valued function (mathematics), function of the entries of a square matrix. The determinant of a matrix is commonly denoted , , or . Its value characterizes some properties of the ...
for rectangular matrices.
Cullis died in Gloucester and bequeathed £1000 to Gonville & Caius college to support needy students.ACAD - A Cambridge Alumni Database
References
External links
* Matrices and determinoids (1913–18Volume 1
{{DEFAULTSORT:Cullis, Cuthbert Edmund 1868 births 1954 deaths Academic staff of the University of Calcutta Alumni of the University of Cambridge English mathematicians