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- Christos_Papakyriakopoulos abstract "Christos Dimitriou Papakyriakopoulos, commonly known as "Papa" (Χρήστος Δημητρίου Παπακυριακόπουλος in Greek; born in Chalandri, Athens, Greece on June 29, 1914, died on June 29, 1976, Princeton, New Jersey), was a Greek mathematician specializing in geometric topology. He worked in isolation at Athens University being awarded a Ph.D. in 1943 on the recommendation of Carathéodory. In 1948, he was invited by Ralph Fox to come as his guest at the Princeton mathematics department. Fox had been impressed by a letter from Papakyriakopoulos which purported to prove Dehn's lemma. The proof, as it turned out was faulty, but Fox's sponsorship would continue for many years and enabled Papakyriakopoulos to work on his mathematics without concern of financial support.Papakyriakopoulos is best known for his proofs of Dehn's lemma, the loop theorem, and the sphere theorem, three foundational results for the study of 3-manifolds. In honor of this work, he was awarded the first Veblen Prize in Geometry in 1964. From the early 1960s on, he mostly worked on the Poincaré conjecture.The following unusual limerick was composed by John Milnor, shortly after learning of several graduate students' frustration at completing a project where the work of every Princeton mathematics faculty member was to be summarized in a limerick:The perfidious lemma of DehnWas every topologist's bane 'Til Christos D. Pap- akyriakop-oulos proved it without any strain.This may be the only limerick where one word spans three lines. The phrase "without any strain" is not meant to indicate that Papa did not expend much energy in his efforts. Rather, it refers to Papa's "tower construction", which quite nicely circumvents much of the difficulty in the cut-and-paste efforts that preceded Papa's proof.He sympathized with leftist politics. When he went to live in the USA, the Greek authorities reported him to the American authorities as a "communist".He was a reclusive character, spending most of his time in his office listening to his beloved Wagner. Legend has it that in the US he lived for 25 years in the same hotel room he used when he first arrived in the country, all of his belongings inside his original luggage.He died of stomach cancer at age 62 in Princeton, New Jersey.".
- Christos_Papakyriakopoulos birthDate "1914-06-29".
- Christos_Papakyriakopoulos birthPlace Athens.
- Christos_Papakyriakopoulos birthPlace Chalandri.
- Christos_Papakyriakopoulos birthYear "1914".
- Christos_Papakyriakopoulos deathDate "1976-06-29".
- Christos_Papakyriakopoulos deathPlace Princeton_University.
- Christos_Papakyriakopoulos deathYear "1976".
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- Christos_Papakyriakopoulos dateOfBirth "1914-06-29".
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- Christos_Papakyriakopoulos name "Papakyriakopoulos, Christos".
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- Christos_Papakyriakopoulos shortDescription "Greek mathematician".
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- Christos_Papakyriakopoulos comment "Christos Dimitriou Papakyriakopoulos, commonly known as "Papa" (Χρήστος Δημητρίου Παπακυριακόπουλος in Greek; born in Chalandri, Athens, Greece on June 29, 1914, died on June 29, 1976, Princeton, New Jersey), was a Greek mathematician specializing in geometric topology. He worked in isolation at Athens University being awarded a Ph.D. in 1943 on the recommendation of Carathéodory. In 1948, he was invited by Ralph Fox to come as his guest at the Princeton mathematics department.".
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