Twenty (UK)QuadrilateralMarcus Du SautoyHexagonDecagonThirtyTenSix
Aleksandr Jakovlevič Chinčin (Aleksandr Yakovlevich Khinchin) János Bolyai Pafnutij L'vovič Čebyšëv (Pafnuty Lvovich Chebyshev) Jean-Louis Koszul
Words in EnglishPronunciation and meaning