In 1897 Bricard published an important investigation on flexible polyhedra.[4] In it he classified all flexible octahedra, now known as Bricard octahedra.[5] This work was the subject of Henri Lebesgue's lectures in 1938.[6] Later Bricard discovered notable 6-bar linkages.[7][8]
^"Prize Awards of the Paris Academy of Sciences", Nature vol. 131 (1933) 174-175.
^R. Bricard, "Sur une question de géométrie relative aux polyèdres", Nouvelles annales de mathématiques, Ser. 3, Vol. 15 (1896), 331-334.
^R. Bricard, Mémoire sur la théorie de l’octaèdre articulé Archived 2011-07-17 at the Wayback Machine, J. Math. Pures Appl., Vol. 3 (1897), 113–150 (see also the English translation and an alternative scan).
^Guy Richard K. (2007). "The Lighthouse Theorem, Morley & Malfatti - A Budget of Paradoxes" (PDF). American Mathematical Monthly. 114 (2): 97–141. doi:10.1080/00029890.2007.11920398. JSTOR 27642143. S2CID 46275242. Archived from the original (PDF) on April 19, 2012.
^Encyclopedia of Esperanto Archived 2008-12-18 at the Wayback Machine
^Emch, Arnold (1925). "Review: Petit Traité de Perspective by Raoul Bricard" (PDF). Bull. Amer. Math. Soc. 31 (9): 564–565. doi:10.1090/s0002-9904-1925-04125-7.
References
Laurent R., Raoul Bricard, Professeur de Géométrie appliquée aux arts, in Fontanon C., Grelon A. (éds.), Les professeurs du Conservatoire national des arts et métiers, dictionnaire biographique, 1794-1955, INRP-CNAM, Paris 1994, vol. 1, pp. 286–291.