Remarkably, however, he remained extremely active in his mathematical research despite his physical problems and in the remaining 10 years of his life he wrote around 100 papers.
Halatang-halata, gayunpaman, siya ay nanatili balisang-aktibo sa kanyang matematiko pananaliksik sa kabila ng kanyang pisikal na problema at sa natitirang 10 taon ng kanyang buhay siya wrote paligid ng 100 na mga papeles.