Nikolaj Ivanovič Lobačevskij (Nikolai Ivanovich Lobachevsky)Aleksandr Jakovlevič Chinčin (Aleksandr Yakovlevich Khinchin)HeptagonLuitzen Egbertus Jan BrouwerThreeJakob BernouilliYìbǎiSymmetry
Adrien-Marie Legendre Jean Baptiste Le Rond d'Alembert Gottfried Leibniz Walter A. Shewhart
Words in RussianThe pronunciation in Italian