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Yitang Zhang
Yitang Zhang (; born February 5, 1955) is a Chinese American mathematician primarily working on number theory and a professor of mathematics at the University of California, Santa Barbara since 2015. Previously working at the University of New Hampshire as a lecturer, Zhang submitted a paper to the ''Annals of Mathematics'' in 2013 which established the first finite bound on the least gap between consecutive primes that is attained infinitely often. This work led to a 2013 Ostrowski Prize, a 2014 Cole Prize, a 2014 Rolf Schock Prize, and a 2014 MacArthur award. Zhang became a professor of mathematics at the University of California, Santa Barbara in fall 2015. Early life and education Zhang was born in Shanghai, China, with his ancestral home in Pinghu, Zhejiang. He lived in Shanghai with his grandmother until he went to Peking University. At around the age of nine, he found a proof of the Pythagorean theorem. He first learned about Fermat's Last Theorem and the Goldbach conj ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zhang (surname)
Zhang () is the third most common surname in China and Taiwan (commonly spelled as "Chang" in Taiwan), and it is one of the most common surnames in the world. Zhang is the pinyin romanization of the very common Chinese surname written in simplified characters and in traditional characters. It is spoken in the first tone: ''Zhāng''. It is a surname that exists in many languages and cultures, corresponding to the surname 'Archer' in English for example. In the Wade-Giles system of romanization, it is romanized as "Chang", which is commonly used in Taiwan; "Cheung" is commonly used in Hong Kong as romanization. It is also the pinyin romanization of the less-common surnames (''Zhāng''), which is the 40th name on the '' Hundred Family Surnames'' poem. There is the even-less common (''Zhǎng''). was listed 24th in the famous Song-era '' Hundred Family Surnames'', contained in the verse 何呂施張 (He Lü Shi Zhang). Today, it is one of the most common surnames in the worl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ancestral Home
An ancestral home is the place of origin of one's extended family, particularly the home owned and preserved by the same family for several generations. The term can refer to an individual house or estate, or to a broader geographic area such as a town, a region, or an entire country. An ancestral home may be a physical place, part of a series of places that one associates with state, nation or region. In the latter cases, the phrase ancestral homeland might be used. In particular, the concept of a diaspora requires the concept of an ancestral home from which the diaspora emanates. However, it is also possible that " e family living in an ancestral home is surrounded by visible, physical symbols of family continuity and solidarity". Ancestral homes and diaspora Ancestral homes are considered by some social scientists to be central to humans' need to acquire a sense of rootedness and smoothly transition to and from different stages of life. People maintain their connections to thei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subway (restaurant)
Subway is an American multinational fast food restaurant franchise that specializes in submarine sandwiches (subs), wraps, salads and drinks. Subway was founded by 17-year-old Fred DeLuca and financed by Peter Buck in 1965 as Pete's Super Submarines in Bridgeport, Connecticut. After several name changes in the beginning years, it was finally renamed Subway in 1972, and a franchise operation began in 1974 with a second restaurant in Wallingford, Connecticut. Since then, it has expanded to become a global franchise. Subway serves an array of topping choices, allowing the customer to choose which toppings are included in their sandwich. The longtime Subway slogan, "Eat Fresh", is intended to indicate the fresh ingredients that are used in their sandwiches. It was the fastest-growing franchise in the world in 2015 and, as of June 2021, had 37,540 locations in more than 100 countries and territories. More than half its locations (21,796 or 58.1%) are in the United State ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kentucky
Kentucky ( , ), officially the Commonwealth of Kentucky, is a state in the Southeastern region of the United States and one of the states of the Upper South. It borders Illinois, Indiana, and Ohio to the north; West Virginia and Virginia to the east; Tennessee to the south; and Missouri to the west. Its northern border is defined by the Ohio River. Its capital is Frankfort, and its two largest cities are Louisville and Lexington. Its population was approximately 4.5 million in 2020. Kentucky was admitted into the Union as the 15th state on June 1, 1792, splitting from Virginia in the process. It is known as the "Bluegrass State", a nickname based on Kentucky bluegrass, a species of green grass found in many of its pastures, which has supported the thoroughbred horse industry in the center of the state. Historically, it was known for excellent farming conditions for this reason and the development of large tobacco plantations akin to those in Virginia and North Carolin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kenneth Appel
Kenneth Ira Appel (October 8, 1932 – April 19, 2013) was an American mathematician who in 1976, with colleague Wolfgang Haken at the University of Illinois at Urbana–Champaign, solved one of the most famous problems in mathematics, the four-color theorem. They proved that any two-dimensional map, with certain limitations, can be filled in with four colors without any adjacent "countries" sharing the same color. Biography Appel was born in Brooklyn, New York, on October 8, 1932. He grew up in Queens, New York, and was the son of a Jewish couple, Irwin Appel and Lillian Sender Appel. He worked as an actuary for a brief time and then served in the U.S. Army for two years at Fort Benning, Georgia, and in Baumholder, Germany. In 1959, he finished his doctoral program at the University of Michigan, and he also married Carole S. Stein in Philadelphia. The couple moved to Princeton, New Jersey, where Appel worked for the Institute for Defense Analyses from 1959 to 1961. His main ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alec Wilkinson
Alec Wilkinson (born 1952) is a writer who has been on the staff of ''The New Yorker'' since 1980. According to ''The Philadelphia Inquirer '' he is among the "first rank of" contemporary American (20th and early 21st century) "literary journalists...(reminiscent) of Naipaul, Norman Mailer and Agee". Career Wilkinson is the author of ten books. His most recent book is ''The Ice Balloon'' (2012), the account of the Swedish visionary aeronaut S.A. Andree's attempt, in 1897, to discover the North Pole by flying to it in a hydrogen balloon. He is also the author of "Sister Sorry," a play based on "The Confession," a story of his that appeared in The New Yorker in 1993. “Sister Sorry” had its premiere at Barrington Stage Company in Pittsfield, Massachusetts during their 2021 season. Before Wilkinson was a writer, he spent a year as a policeman in Wellfleet, Massachusetts, on Cape Cod, which is the subject of ''Midnights, a Year with the Wellfleet Police,'' and before that he ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The New Yorker
''The New Yorker'' is an American weekly magazine featuring journalism, commentary, criticism, essays, fiction, satire, cartoons, and poetry. Founded as a weekly in 1925, the magazine is published 47 times annually, with five of these issues covering two-week spans. Although its reviews and events listings often focus on the cultural life of New York City, ''The New Yorker'' has a wide audience outside New York and is read internationally. It is well known for its illustrated and often topical covers, its commentaries on popular culture and eccentric American culture, its attention to modern fiction by the inclusion of short stories and literary reviews, its rigorous fact checking and copy editing, its journalism on politics and social issues, and its single-panel cartoons sprinkled throughout each issue. Overview and history ''The New Yorker'' was founded by Harold Ross and his wife Jane Grant, a ''New York Times'' reporter, and debuted on February 21, 1925. Ross wanted t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
George Csicsery
George Paul Csicsery (born March 17, 1948) is a Hungarian-American writer and independent filmmaker who has directed 35 films including performance films, dramatic shorts and documentaries. He is best known for his documentaries about mathematicians and mathematical communities. Life and career George Csicsery was born in Regensburg, Germany to Hungarian parents who had fled their native country after WWII (his father was a monarchist army officer).Zala Films Official site for films by George Csicsery In 1951, the family emigrated to . After a series of menial jobs his father became a successful stained glass and enamel artist and his mother became head of the slide library at the Cleveland Museum of Art ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jacobian Conjecture
In mathematics, the Jacobian conjecture is a famous unsolved problem concerning polynomials in several variables. It states that if a polynomial function from an ''n''-dimensional space to itself has Jacobian determinant which is a non-zero constant, then the function has a polynomial inverse. It was first conjectured in 1939 by Ott-Heinrich Keller, and widely publicized by Shreeram Abhyankar, as an example of a difficult question in algebraic geometry that can be understood using little beyond a knowledge of calculus. The Jacobian conjecture is notorious for the large number of attempted proofs that turned out to contain subtle errors. As of 2018, there are no plausible claims to have proved it. Even the two-variable case has resisted all efforts. There are currently no known compelling reasons for believing the conjecture to be true, and according to van den Essen there are some suspicions that the conjecture is in fact false for large numbers of variables (indeed, there i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ding Shisun
Ding Shisun (; September 5, 1927 – October 12, 2019) was a Chinese mathematician, academic administrator, and politician. He served as President of Peking University during the 1989 Tiananmen Square protests and was forced to resign afterwards. He later served as Chairman of the China Democratic League from 1996 to 2005 and Vice Chairperson of the National People's Congress. Early life Ding was born on September 5, 1927 in Shanghai, Republic of China, to Ding Jiacheng () and Liu Huixian (), with his ancestral home in Zhenjiang, Jiangsu. He attended Utopia University in Shanghai from 1944 to 1947. A participant in anti-government student activities, he was arrested by the Kuomintang government and expelled by the university. As a result, he moved north to Beijing and entered Tsinghua University in 1948. Early career Ding graduated from the Department of Mathematics of Tsinghua University in 1950, after the founding of the People's Republic of China, and was hired by th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cultural Revolution
The Cultural Revolution, formally known as the Great Proletarian Cultural Revolution, was a sociopolitical movement in the People's Republic of China (PRC) launched by Mao Zedong in 1966, and lasting until his death in 1976. Its stated goal was to preserve Chinese communism by purging remnants of capitalist and traditional elements from Chinese society. The Revolution marked the effective commanding return of Mao –who was still the Chairman of the Chinese Communist Party (CCP)– to the centre of power, after a period of self-abstention and ceding to less radical leadership in the aftermath of the Mao-led Great Leap Forward debacle and the Great Chinese Famine (1959–1961). The Revolution failed to achieve its main goals. Launching the movement in May 1966 with the help of the Cultural Revolution Group, Mao charged that bourgeois elements had infiltrated the government and society with the aim of restoring capitalism. Mao called on young people to " bombard the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Goldbach Conjecture
Goldbach's conjecture is one of the oldest and best-known unsolved problems in number theory and all of mathematics. It states that every even natural number greater than 2 is the sum of two prime numbers. The conjecture has been shown to hold for all integers less than 4 × 1018, but remains unproven despite considerable effort. History On 7 June 1742, the German mathematician Christian Goldbach wrote a letter to Leonhard Euler (letter XLIII), in which he proposed the following conjecture: Goldbach was following the now-abandoned convention of considering 1 to be a prime number, so that a sum of units would indeed be a sum of primes. He then proposed a second conjecture in the margin of his letter, which implies the first: Euler replied in a letter dated 30 June 1742 and reminded Goldbach of an earlier conversation they had had (), in which Goldbach had remarked that the first of those two conjectures would follow from the statement This is in fact equivalent to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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