Document 1: Summary of the scientific work of Mr. Jean Ville (May 1955).
Document 2: Condorcet on Borda's Memoir (1784).
Document 3: Condorcet again on Borda's Memoir (1785).
Document 3: Jean A. Ville: game theory, duality, economic growth (1983).
Document 4: Condorcet on plurality in an election (1788).
Doob at Lyon. On his lecture “Application of the theory of martingales” at Lyon Colloqium, June 28 – July 3, 1948.