„In some situations however, when you are deeply with your problem, you feel at home anywhere just thinking about your problem. Some of my best work was done in hotels, on the train, and there's no rule. More important when you think is what goes on inside rather outside. […] The best thoughts can be nearly everywhere.“
— Cédric Villani French mathematician 1973
"The Mathematician's Office - Numberphile". youtube.com. August 25, 2016. Retrieved September 16, 2018.