Pafnutij L'vovič Čebyšëv (Pafnuty Lvovich Chebyshev)Nikolaj Ivanovič Lobačevskij (Nikolai Ivanovich Lobachevsky)Wǔ (CN)Sì (CN)Sān (CN)NonoQuartoRoger Penrose
Georg Friedrich Bernhard Riemann János Bolyai Jean Baptiste Le Rond d'Alembert Henri Léon Lebesgue
Words in RussianThe correct pronunciation