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Gregory Freiman
Gregory Abelevich Freiman (born 1926) is a Russian mathematician known for his work in additive number theory, in particular, for proving Freiman's theorem. He is Professor Emeritus in Tel Aviv University. Biographical sketch Freiman was born in Kazan in 1926. He graduated from Moscow University in 1949, and obtained his Candidate of Sciences in Kazan University in 1956. From 1956 he worked in Elabuga, and in 1965 he defended his Doctor of Sciences degree under the joint supervision of Alexander Gelfond, Alexey G. Postnikov, and Alexander Buchstab. From 1967 he worked in Vladimir, and later in Kalinin (now Tver). In the 1970s and early 1980s Freiman participated in the refusenik movement. His samizdat Samizdat (russian: самиздат, lit=self-publishing, links=no) was a form of dissident activity across the Eastern Bloc in which individuals reproduced censored and underground makeshift publications, often by hand, and passed the document ... essay ''It seems I am a Jew'', ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Additive Number Theory
Additive number theory is the subfield of number theory concerning the study of subsets of integers and their behavior under addition. More abstractly, the field of additive number theory includes the study of abelian groups and commutative semigroups with an operation of addition. Additive number theory has close ties to combinatorial number theory and the geometry of numbers. Two principal objects of study are the sumset of two subsets ''A'' and ''B'' of elements from an abelian group ''G'', :A + B = \, and the h-fold sumset of ''A'', :hA = \underset\,. Additive number theory The field is principally devoted to consideration of ''direct problems'' over (typically) the integers, that is, determining the structure of ''hA'' from the structure of ''A'': for example, determining which elements can be represented as a sum from ''hA'', where ''A'' is a fixed subset.Nathanson (1996) II:1 Two classical problems of this type are the Goldbach conjecture (which is the conjecture that 2 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Refusenik
Refusenik (russian: отказник, otkaznik, ; alternatively spelt refusnik) was an unofficial term for individuals—typically, but not exclusively, Soviet Jews—who were denied permission to emigrate, primarily to Israel, by the authorities of the Soviet Union and other countries of the Eastern bloc. The term ''refusenik'' is derived from the "refusal" handed down to a prospective emigrant from the Soviet authorities. In addition to the Jews, broader categories included: *Other ethnicities, such as Volga Germans attempting to leave for Germany, Armenians wanting to join their diaspora, and Greeks forcibly removed by Stalin from Crimea and other southern lands to Siberia. *Members of persecuted religious groups, such as the Ukrainian Greek-Catholic Church, Baptists and other Protestant groups, Jehovah's Witnesses, and Russian Mennonites. A typical basis to deny emigration was the alleged association with Soviet state secrets. Some individuals were labelled as foreign ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Number Theorists
Number theory (or arithmetic or higher arithmetic in older usage) is a branch of pure mathematics devoted primarily to the study of the integers and integer-valued functions. German mathematician Carl Friedrich Gauss (1777–1855) said, "Mathematics is the queen of the sciences—and number theory is the queen of mathematics."German original: "Die Mathematik ist die Königin der Wissenschaften, und die Arithmetik ist die Königin der Mathematik." Number theorists study prime numbers as well as the properties of mathematical objects made out of integers (for example, rational numbers) or defined as generalizations of the integers (for example, algebraic integers). Integers can be considered either in themselves or as solutions to equations (Diophantine geometry). Questions in number theory are often best understood through the study of analytical objects (for example, the Riemann zeta function) that encode properties of the integers, primes or other number-theoretic objects in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Israeli Mathematicians
Israeli may refer to: * Something of, from, or related to the State of Israel * Israelis, citizens or permanent residents of the State of Israel * Modern Hebrew, a language * ''Israeli'' (newspaper), published from 2006 to 2008 * Guni Israeli (born 1984), Israeli basketball player See also * Israelites, the ancient people of the Land of Israel * List of Israelis Israelis ( he, ישראלים ''Yiśraʾelim'') are the citizens or permanent residents of the State of Israel, a multiethnic state populated by people of different ethnic backgrounds. The largest ethnic groups in Israel are Jews (75%), foll ... {{disambiguation Language and nationality disambiguation pages ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Israeli Jews
Israeli Jews or Jewish Israelis ( he, יהודים ישראלים, translit=Yehudim Yisraelim) are Israeli citizens and nationals who are Jewish through either their Jewish ethnicity and/or their adherence to Judaism. The term also includes the descendants of Jewish Israelis who have emigrated and settled outside of the State of Israel. Alongside Samaritans and populations from the Jewish diaspora scattered outside of the Land of Israel, Jewish Israelis comprise the modern descendants of the ancient Israelites and Hebrews. They are predominantly found in Israel and the Western world, as well as in other countries worldwide in smaller numbers. The overwhelming majority of Israeli Jews speak Hebrew, a Semitic language, as their native tongue. Israel, the Jewish state, is the only country that has a Jewish-majority population, and is currently home to approximately half of the world's Jews. The Jewish population in Israel comprises all of the communities of the Jewish diaspo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Israeli People Of Russian-Jewish Descent
Israeli may refer to: * Something of, from, or related to the State of Israel * Israelis, citizens or permanent residents of the State of Israel * Modern Hebrew, a language * ''Israeli'' (newspaper), published from 2006 to 2008 * Guni Israeli (born 1984), Israeli basketball player See also * Israelites, the ancient people of the Land of Israel * List of Israelis Israelis ( he, ישראלים ''Yiśraʾelim'') are the citizens or permanent residents of the State of Israel, a multiethnic state populated by people of different ethnic backgrounds. The largest ethnic groups in Israel are Jews (75%), foll ... {{disambiguation Language and nationality disambiguation pages ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Russian Jews
The history of the Jews in Russia and areas historically connected with it goes back at least 1,500 years. Jews in Russia have historically constituted a large religious and ethnic diaspora; the Russian Empire at one time hosted the largest population of Jews in the world. Within these territories the primarily Ashkenazi Jewish communities of many different areas flourished and developed many of modern Judaism's most distinctive theological and cultural traditions, while also facing periods of anti-Semitic discriminatory policies and persecutions. Some have described a "renaissance" in the Jewish community inside Russia since the beginning of the 21st century.Renaissance of Jewish life in Russia November 23, 2001, By John ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1926 Births
Events January * January 3 – Theodoros Pangalos (general), Theodoros Pangalos declares himself dictator in Greece. * January 8 **Abdul-Aziz ibn Saud is crowned King of Kingdom of Hejaz, Hejaz. ** Bảo Đại, Crown Prince Nguyễn Phúc Vĩnh Thuy ascends the throne, the last monarch of Vietnam. * January 12 – Freeman Gosden and Charles Correll premiere their radio program ''Sam 'n' Henry'', in which the two white performers portray two black characters from Harlem looking to strike it rich in the big city (it is a precursor to Gosden and Correll's more popular later program, ''Amos 'n' Andy''). * January 16 – A BBC comic radio play broadcast by Ronald Knox, about a workers' revolution, causes a panic in London. * January 21 – The Belgian Parliament accepts the Locarno Treaties. * January 26 – Scottish inventor John Logie Baird demonstrates a mechanical television system at his London laboratory for members of the Royal Institution and a report ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Living People
Related categories * :Year of birth missing (living people) / :Year of birth unknown * :Date of birth missing (living people) / :Date of birth unknown * :Place of birth missing (living people) / :Place of birth unknown * :Year of death missing / :Year of death unknown * :Date of death missing / :Date of death unknown * :Place of death missing / :Place of death unknown * :Missing middle or first names See also * :Dead people * :Template:L, which generates this category or death years, and birth year and sort keys. : {{DEFAULTSORT:Living people 21st-century people People by status ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boris M
Boris may refer to: People * Boris (given name), a male given name *:''See'': List of people with given name Boris * Boris (surname) * Boris I of Bulgaria (died 907), the first Christian ruler of the First Bulgarian Empire, canonized after his death * Boris II of Bulgaria (c. 931–977), ruler of the First Bulgarian Empire * Boris III of Bulgaria (1894–1943), ruler of the Kingdom of Bulgaria in the first half of the 20th century * Boris, Prince of Tarnovo (born 1997), Spanish-born Bulgarian royal * Boris and Gleb (died 1015), the first saints canonized in Kievan Rus * Boris (singer) (born 1965), pseudonym of French singer Philippe Dhondt Arts and media * Boris (band), a Japanese experimental rock trio * ''Boris'' (EP), by Yezda Urfa, 1975 * "Boris" (song), by the Melvins, 1991 * ''Boris'' (TV series), a 2007–2009 Italian comedy series * '' Boris: The Film'', a 2011 Italian film based on the TV series * '' Boris: The Rise of Boris Johnson'', a 2006 biography by Andrew G ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Samizdat
Samizdat (russian: самиздат, lit=self-publishing, links=no) was a form of dissident activity across the Eastern Bloc in which individuals reproduced censored and underground makeshift publications, often by hand, and passed the documents from reader to reader. The practice of manual reproduction was widespread, because most typewriters and printing devices required official registration and permission to access. This was a grassroots practice used to evade official Soviet censorship. Name origin and variations Etymologically, the word ''samizdat'' derives from ''sam'' (, "self, by oneself") and ''izdat'' (, an abbreviation of , , "publishing house"), and thus means "self-published". The Ukrainian language has a similar term: ''samvydav'' (самвидав), from ''sam'', "self", and ''vydavnytstvo'', "publishing house". A Russian poet Nikolay Glazkov coined a version of the term as a pun in the 1940s when he typed copies of his poems and included the note ''Samsebyaizd ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tver
Tver ( rus, Тверь, p=tvʲerʲ) is a city and the administrative centre of Tver Oblast, Russia. It is northwest of Moscow. Population: Tver was formerly the capital of a powerful medieval state and a model provincial town in the Russian Empire, with a population of 60,000 on 14 January 1913. It is situated at the confluence of the Volga and Tvertsa Rivers. The city was known as Kalinin ( rus, Кали́нин, Kalínin) from 1931 to 1990. The city is where three rivers meet, splitting the town into northern and southern parts by the Volga River, and divided again into quarters by the Tvertsa River, which splits the left (northern) bank into east and west halves, and the Tmaka River which does the same along the southern bank. History Medieval origins Tver's foundation year is officially accepted to be 1135,Charter of Tver, Article 1 although there is no universal agreement on this date and some estimates place it as late as the second half of the 13th century. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
