Francesco Faà di Bruno

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Blessed

Francesco Faà di Bruno
Roman Catholic Church (Roman Catholic Archdiocese of Turin)
Beatified25 September 1988, Vatican City, by Pope John Paul II
Major shrineChurch of Our Lady of Suffrage
Turin, Italy
Feast27 March
Francesco Faà di Bruno
Italian
Alma materUniversity of Paris
Known for
Scientific career
Institutions
Augustin Louis Cauchy
Notable students

Francesco Faà di Bruno (7 March 1825 – 25 March 1888) was an

priest and advocate of the poor, a leading mathematician of his era and a noted religious musician. In 1988 he was beatified by Pope John Paul II.[1] He is the eponym of Faà di Bruno's formula
.

Life

Early life

Faà di Bruno was born in

Marchese Luigi Faà di Bruno and the Lady Carolina Sappa de' Milanesi. He was raised in a home marked by happiness, the arts and a concern for the poor arising from the parents' strong Catholic faith.[2]

As a young man, he entered the Royal Army and held, at one time, the rank of

Augustin Cauchy, and Urbain Le Verrier, who both shared in the discovery of the planet Neptune.[3] He was in close contact with the mathematicians François-Napoléon-Marie Moigno and Charles Hermite
.

On his return to Turin, he took up the position of Professor of Mathematics at the local university. In recognition of his achievements as a mathematician, the degree of Doctor of Science was conferred on him by the Universities of Paris and Turin.[3]

Social reformer

While carrying out his career responsibilities, Faà di Bruno also became actively involved in the social outreach to the poor being developed by leading figures of the Catholic Church in Turin. He became a close friend of John Bosco,[4] and helped establish refuges for the elderly and the poor. He oversaw the construction of a church in Turin, Our Lady of Suffrage.[5]

Priest and founder

Somewhat late in his life, Faà di Bruno came to feel that pursuing

Archbishop of Turin
at that time would not accept an older man for ordination, Faà di Bruno being in his late 40s at that time. For centuries, the traditional route for this profession began in a boy's mid-teens.

Faà di Bruno appealed to

prostitutes
.

Faà di Bruno died in Turin on 25 March 1888.

Veneration

The cause for the

Venerable by Pope Paul VI in 1971, and beatified by Pope John Paul II on the centennial of his death in 1988.[1]

In an address to the Minim Sisters in 2002, Pope John Paul II said, ""Francesco Faà di Bruno", I said, is "a giant of faith and charity", for his message of light and love, "far from being exhausted, seems timelier than ever, urging all those who have Gospel values at heart to action"" (Homily, 25 September, n. 4; ORE, 24 October 1988, p. 15).[5]

Research in mathematics

In addition to some ascetical writings, the composition of some sacred melodies, and the invention of some scientific apparatus, Faà di Bruno made numerous and important contributions to mathematics. Today, he is best known for Faà di Bruno's formula on derivatives of composite functions although it is now certain Louis François Antoine Arbogast had priority for its discovery and use. Faà di Bruno should be credited only for the formula's determinant form.[7] However, his work is mainly related to elimination theory and to the theory of elliptic functions.[8]

He was the author of about 40 original articles published in the "Journal de Mathématiques" (edited by

Comptes rendus de l'Académie des sciences", etc.; the first half of an exhaustive treatise on the theory and applications of elliptic functions
which he planned to complete in three volumes; "Théorie générale de l'élimination" (Paris, 1859); "Calcolo degli errori" (Turin, 1867), translated into French under the title of "Traité élémentaire du calcul des erreurs" (Paris, 1869); and most important of all, "Théorie des formes binaires" (Paris, 1876), translated into German (Leipzig, 1881). For a list of the memoirs of Faà di Bruno, see the "Catalogue of Scientific Papers of the Royal Society: (London, 1868, 1877, 1891), t. II, vii, and ix.

Among his students were the noted mathematicians Corrado Segre and Giuseppe Peano.

See also

Notes

  1. ^ a b See the Vatican News Service, "Papal Office for Liturgical Celebrations" (in Italian).
  2. ^ See Solari (2008, pp. 44–47).
  3. ^ a b (Linehan 1909).
  4. ^ See Patrizia Solari (2007, 2008)
  5. ^ a b Pope John Paul II, Message to the Institute of the Minim Sisters of Our Lady of Suffrage, September 2, 2002
  6. ^ Index ac status causarum beatificationis servorum dei et canonizationis beatorum (in Latin). Typis polyglottis vaticanis. January 1953. p. 76.
  7. ^ See the paper of Craik (2005, pp. 233–234): this well written and informative paper details also the works of other earlier scientists.
  8. ^ See Tricomi (1962) and various papers in the volume edited by Giacardi (2005): particularly the later reference states that he introduced the Faà di Bruno's formula to deal with problems in elimination theory.

References

Biographical and general references

Scientific references

External links

 This article incorporates text from a publication now in the public domain: Herbermann, Charles, ed. (1913). "Francesco Faa di Bruno". Catholic Encyclopedia. New York: Robert Appleton Company.

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