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Norman Macleod Ferrers

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Norman Macleod Ferrers
Norman Macleod Ferrers by John Collier
Born(1829-08-11)11 August 1829
Prinknash Park, Upton St Leonards, Gloucestershire, England
Died31 January 1903(1903-01-31) (aged 73)
Cambridge, England
EducationEton College
Alma materGonville and Caius College, Cambridge
Known forFerrers diagram
Nonholonomic constraints
Spouse
Emily Lamb
​
(m. 1866)​
Children4 sons and 1 daughter

Norman Macleod Ferrers D.D. (11 August 1829 – 31 January 1903) was a British mathematician and university administrator and editor of a mathematical journal.

Career and research

Ferrers was educated at Eton College before studying at Gonville and Caius College, Cambridge, where he was Senior Wrangler in 1851. He was appointed to a Fellowship at the college in 1852, was called to the bar in 1855 and was ordained deacon in 1859 and priest in 1860. In 1880, he was appointed Master of the college, and served as vice-chancellor of Cambridge University from 1884 to 1885.[1]

Ferrers made many contributions to mathematical literature. From 1855 to 1891 he worked with J. J. Sylvester as editors, with others, in publishing The Quarterly Journal of Pure and Applied Mathematics. Ferrers assembled the papers of George Green for publication in 1871.[2]

In 1861 he published "An Elementary Treatise on Trilinear Co-ordinates".[3] One of his early contributions was on Sylvester's development of Poinsot's representation of the motion of a rigid body about a fixed point.

In 1871 he first suggested to extend the equations of motion with nonholonomic constraints.[4] His another treatise on "Spherical Harmonics," published in 1877, presented many original features. In 1881 he studied Kelvin's investigation of the law of distribution of electricity in equilibrium on an uninfluenced spherical bowl and made the addition of finding the potential at any point of space in zonal harmonics.

He died at the College Lodge on 31 January 1903.[5]

Integer partitions

Ferrers is a associated with a particular way of arranging the partition of a natural number p. If p is the sum of n terms, the largest of which is m, then the Ferrers diagram starts with a row of m dots. The terms are arranged in order, and a row of dots corresponds to each term.

Adams, Ferrers, and Sylvester articulated this theorem of partitions: "The number of modes of partitioning (n) into (m) parts is equal to the number of modes of partitioning (n) into parts, one of which is always (m), and the others (m) or less than (m)." The proof, attributed to Ferrers by Sylvester in 1883, involves flipping a Ferrers diagram about a diagonal line.[6]

In 1951 Jacques Riguet adopted this manner of ordering to the rows of a logical matrix. Alignment of rows of ones along the right side of a matrix is used, instead of the alignment of dots on the left. The logical matrix corresponds to a heterogeneous relation of Ferrers type.[7]

Family

On 3 April 1866, he married Emily, daughter of John Lamb, dean of Bristol cathedral. They had four sons and one daughter.[5]

Bibliography

References

  1. ^ "Ferrers, Rev. Norman Macleod". Who Was Who 1920–2008. Oxford University Press. December 2007. Retrieved 1 November 2009.
  2. ^ N. M. Ferrers editor (1871) The Mathematical Papers of the late George Green, Macmillan Publishers, link from University of Michigan Historical Math Collection
  3. ^ Ferrers, N.M. (1861). An Elementary Treatise on Trilinear Co-ordinates: The Method of Reciprocal Polars, and the Theory of Projections. Macmillan.
  4. ^ Ferrers, N.M. (1872). "Extension of Lagrange's equations". The Quarterly Journal of Pure and Applied Mathematics. XII: 1–5.
  5. ^ a b Venn, John (1912). "Ferrers, Norman MacLeod" . In Lee, Sidney (ed.). Dictionary of National Biography (2nd supplement). London: Smith, Elder & Co.
  6. ^ O'Connor, John J.; Robertson, Edmund F., "Norman Macleod Ferrers", MacTutor History of Mathematics Archive, University of St Andrews
  7. ^ Jacques Riguet (1952) "Les relations de Ferrers", Comptes Rendus 232: 1729-30 pdf link at archive.org
Academic offices
Preceded by Master of Gonville and Caius College
1880-1903 		Succeeded by
Preceded by
James Porter
 Vice-Chancellor of the University of Cambridge
1884-1885 		Succeeded by
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