Personal Life
Von Neumann had a wide range of cultural interests. Since the age of six, von Neumann had been fluent in Latin and ancient Greek, and he held a lifelong passion for ancient history, being renowned for his prodigious historical knowledge. A professor of Byzantine history once reported that von Neumann had greater expertise in Byzantine history than he did.
Von Neumann took great care over his clothing, and would always wear formal suits, once riding down the Grand Canyon astride a mule in a three-piece pin-stripe. Mathematician David Hilbert is reported to have asked at von Neumann's 1926 doctoral exam: “Pray, who is the candidate’s tailor?” as he had never seen such beautiful evening clothes.
He was sociable and, during his first marriage, he enjoyed throwing large parties at his home in Princeton, occasionally twice a week. His white clapboard house at 26 Westcott Road was one of the largest in Princeton.
Despite being a notoriously bad driver, he nonetheless enjoyed driving (frequently while reading a book)—occasioning numerous arrests as well as accidents. When Cuthbert Hurd hired him as a consultant to IBM, Hurd often quietly paid the fines for his traffic tickets. He believed that much of his mathematical thought occurred intuitively, and he would often go to sleep with a problem unsolved, and know the answer immediately upon waking up.
Von Neumann liked to eat and drink; his wife, Klara, said that he could count everything except calories. He enjoyed Yiddish and "off-color" humor (especially limericks). At Princeton he received complaints for regularly playing extremely loud German marching music on his gramophone, which distracted those in neighbouring offices, including Einstein, from their work. Von Neumann did some of his best work blazingly fast in noisy, chaotic environments, and once admonished his wife for preparing a quiet study for him to work in. He never used it, preferring the couple's living room with its TV playing loudly.
Von Neumann's closest friend in the United States was the Polish mathematician Stanislaw Ulam. A later friend of Ulam's, Gian-Carlo Rota writes: "They would spend hours on end gossiping and giggling, swapping Jewish jokes, and drifting in and out of mathematical talk." When von Neumann was dying in hospital, every time Ulam would visit he would come prepared with a new collection of jokes to cheer up his friend.
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