Dominique Pierre Perrin (b. 1946) is a French mathematician and theoretical computer scientist known for his contributions to coding theory and to combinatorics on words.
 He is a professor of the University of Marne-la-Vallée and currently serves as the President of ESIEE Paris.
Jean-Baptiste le Rond d'Alembert ( ; ] ; 16 November 1717 – 29 October 1783) was a French mathematician, mechanician, physicist, philosopher, and music theorist.
 Until 1759 he was also co-editor with Denis Diderot of the "Encyclopédie".
 D'Alembert's formula for obtaining solutions to the wave equation is named after him.
 The Wave equation is sometimes referred to as d'Alembert's equation.
Nicolae Popescu, Ph.D., D.Phil.
 (] ; 22 September 1937 – 29 July 2010) was a Romanian mathematician and Emeritus Professor.
 Popescu was elected a Member of the Romanian Academy in 1992.
 He is best known for his contributions to Algebra and the theory of Abelian categories.
 Since 1964 and until 2007 he collaborated on the characterization of abelian categories with the well-known French mathematician Pierre Gabriel.
 His areas of expertise were: Category theory, Abelian categories with Applications to Rings and Modules, adjoint functors, limits/colimits, Theory of Sheaves, Theory of Rings, Fields and Polynomials, and Valuation Theory; he also had interests and published in the following areas: Algebraic Topology, Algebraic Geometry, Commutative Algebra, K-Theory, Class-Field theory, and Algebraic Function Theory.
 He published between 1962 and 2008 more than 102 papers in peer-reviewed, mathematics journals, several monographs on the theory of sheaves, and also six books on abelian category theory and abstract algebra.
 In a Grothendieck-like, energetic style, he initiated and provided scientific leadership to several seminars on category theory, sheaves and abstract algebra which resulted in a continuous stream of high-quality mathematical publications in international, peer-reviewed mathematics journals by several members participating in his Seminar series.
 His book "Abelian Categories with Applications to Rings and Modules" continues to provide valuable information to mathematicians around the world.
 His latest contributions have also branched into valuation and number theory.
 He has published over 110 original, peer-reviewed articles in mathematics, mostly in category theory, algebraic geometry, and Galois and number theory.
Henri Paul Cartan (] ; July 8, 1904 – August 13, 2008) was a French mathematician with substantial contributions in algebraic topology.
 He was the son of the French mathematician Élie Cartan and the brother of composer Jean Cartan.
Pierre Ossian Bonnet (] ; 22 December 1819, Montpellier – 22 June 1892, Paris) was a French mathematician.
 He made some important contributions to the differential geometry of surfaces, including the Gauss–Bonnet theorem.
Pierre Rémond de Montmort, a French mathematician, was born in Paris on 27 October 1678, and died there on 7 October 1719.
 His name was originally just Pierre Rémond or Raymond.
 His father pressured him to study law, but he rebelled and travelled to England and Germany, returning to France in 1699 when, upon receiving a large inheritance from his father, he bought an estate and took the name de Montmort.
 He was friendly with several other notable mathematicians, and especially Nicholas Bernoulli, who collaborated with him while visiting his estate.
 He was elected a fellow of the Royal Society in 1715, while traveling again to England, and became a member of the French Academy of Sciences in 1716.
Henri Berestycki (born 25 March 1951, in Paris) is a French mathematician who obtained his PhD from Université Paris VI – Université Pierre et Marie Curie in 1975.
 His Dissertation was titled "Contributions à l'étude des problèmes elliptiques non linéaires", and his doctoral advisor was Haim Brezis He was an L.E. Dickson Instructor in Mathematics at the University of Chicago from 1975–77, after which he returned to France to continue his research.
 He has made many contributions in nonlinear analysis, ranging from nonlinear elliptic equations, hamiltonian systems, spectral theory of elliptic operators, and with applications to the description of mathematical modelling of fluid mechanics and combustion.
 His current research interests include the mathematical modelling of financial markets, mathematical models in biology and especially in ecology, and modelling in social sciences (in particular, urban planning and criminology).
 For these latter topics, he obtained an ERC Advanced grant in 2012.
Pierre Joseph Louis Fatou (28 February 1878 – 10 August 1929) was a French mathematician and astronomer.
 He is known for major contributions to several branches of analysis.
 The Fatou lemma and the Fatou set are named after him.
Gaston Maurice Julia (3 February 1893 – 19 March 1978) was a French mathematician who devised the formula for the Julia set.
 His works were popularized by French mathematician Benoit Mandelbrot; the Julia and Mandelbrot fractals are closely related.
Pierre Tarin (1735–1761) was a French doctor, writer, and translator, born in Courtenay.
 He is best known for his contributions to "Encyclopédie" by Diderot and D'Alembert.

Question: Pierre Tarin was known for contributions to the Encyclopédie by which French mathematician?
Answer: Jean-Baptiste le Rond d'Alembert