Gabriel Xavier Paul Koenigs

Gabriel Xavier Paul Koenigs (17 January 1858 in Toulouse, France – 29 October 1931 in Paris, France) was a French mathematician who worked on analysis and geometry. He was elected as Secretary General of the Executive Committee of the International Mathematical Union after the first world war, and used his position to exclude countries with whom France had been at war from the mathematical congresses.
He was awarded the Poncelet Prize for 1893.

• Koenigs G. Recherches sur les intégrals de certaines équations fontionnelles. Ann. École Normale, Suppl., 1884, (3)1.
• Leçons de la'grégation classique de mathématiques. A. Hermann. 1892. 
• Mémoire sur les lignes géodésiques. Paris: Imp. nationale. 1894. 
• La géométrie réglée et ses applications. Gauthier-Villars. 1895. 
• Leçons de cinématique. Paris: A. Hermann. 1897. 
• Introduction a une théorie nouvelle des mechanismes. A. Hermann. 1905. 

• Snyder, Virgil (1897). "Review: La Géométrie réglée et ses applications, by G. Koenigs". Bull. Amer. Math. Soc. 4 (1): 28–31. doi:10.1090/s0002-9904-1897-00452-9. 
• Lovett, E. O. (1900). "Review: Leçons de Cinématique, by Gabriel Koenigs". Bull. Amer. Math. Soc. 6 (7): 299–304. doi:10.1090/s0002-9904-1900-00722-1.