All—except for one single formality which made up for 5%, but certainly not for 20% of the problem; in other words, how to express component parts by equations.
"[1] A short autobiographic sketch goes back to the early 1990s,[2] a longer autobiography talks about his education and life at Citroën until his retirement.
[3] He continued publishing in retirement, which led to three monographs and ten academic papers, most of his publications written in French.
[4] De Casteljau's algorithm is widely used, with some modifications, as it is the most robust and numerically stable method for evaluating polynomials.
Paul de Casteljau received the 1987 Seymour Cray Prize from the French National Center for Scientific Research, the 1993 John Gregory Memorial Award, and the 2012 Bézier Award from the Solid Modeling Association (SMA).