Mathematician, Physicist, Philosopher and Music Theorist.
Jean-Baptiste le Rond d'Alembert (16 November 1717 – 29 October 1783) was a French mathematician, mechanician, physicist, philosopher, and music theorist. 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.
1.) Jonathan Israel (2011). Democratic Enlightenment: Philosophy, Revolution, and Human Rights 1750-1790. Oxford University Press. p. 115. ISBN 978-0-19-954820-0. "D'Alembert, though privately an atheist and materialist, presented the respectable public face of 'la philosophie' in the French capital while remaining henceforth uninterruptedly aligned with Voltaire."
2.) James E. Force, Richard Henry Popkin, ed. (1990). Essays on the Context, Nature, and Influence of Isaac Newton's Theology. Springer. p. 167. ISBN 9780792305835. "Unlike the French and English deists, and unlike the scientific atheists such as Diderot, d'Alembert, and d'Holbach,..."