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Valentin Vornicu
Valentin Vornicu is a mathematician, professional midstakes poker player, and software engineer, formerly at Google, with 13 World Series of Poker circuit rings. Valentin is from Romania and now resides in San Diego, California. Vornicu is the founder of MathLinks, an educational resource company. Before founding MathLinks, he worked as a full-stack engineer for Art of Problem Solving. Mathematics and education Valentin Vornicu was a part of the Romanian team for the International Mathematics Olympiad (IMO) in 2001 and 2002. In 2002 he earned a bronze medal at the IMO. He graduated at the University of Bucharest in 2006, and got his Master's Degree in Algebra and Number Theory at the same University in 2008. Vornicu also, in 2007, discovered a generalized form of Schur's inequality In mathematics, Schur's inequality (mathematics), inequality, named after Issai Schur, establishes that for all Nonnegative number, non-negative real numbers ''x'', ''y'', ''z'', and ''t>0'', :x^ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Romania
Romania ( ; ro, România ) is a country located at the crossroads of Central, Eastern, and Southeastern Europe. It borders Bulgaria to the south, Ukraine to the north, Hungary to the west, Serbia to the southwest, Moldova to the east, and the Black Sea to the southeast. It has a predominantly temperate- continental climate, and an area of , with a population of around 19 million. Romania is the twelfth-largest country in Europe and the sixth-most populous member state of the European Union. Its capital and largest city is Bucharest, followed by Iași, Cluj-Napoca, Timișoara, Constanța, Craiova, Brașov, and Galați. The Danube, Europe's second-longest river, rises in Germany's Black Forest and flows in a southeasterly direction for , before emptying into Romania's Danube Delta. The Carpathian Mountains, which cross Romania from the north to the southwest, include Moldoveanu Peak, at an altitude of . Settlement in what is now Romania began in the Lower Pale ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mathematics
Mathematics is an area of knowledge that includes the topics of numbers, formulas and related structures, shapes and the spaces in which they are contained, and quantities and their changes. These topics are represented in modern mathematics with the major subdisciplines of number theory, algebra, geometry, and analysis, respectively. There is no general consensus among mathematicians about a common definition for their academic discipline. Most mathematical activity involves the discovery of properties of abstract objects and the use of pure reason to prove them. These objects consist of either abstractions from nature orin modern mathematicsentities that are stipulated to have certain properties, called axioms. A ''proof'' consists of a succession of applications of deductive rules to already established results. These results include previously proved theorems, axioms, andin case of abstraction from naturesome basic properties that are considered true starting poin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Mathematical Olympiad
The International Mathematical Olympiad (IMO) is a mathematical olympiad for pre-university students, and is the oldest of the International Science Olympiads. The first IMO was held in Romania in 1959. It has since been held annually, except in 1980. More than 100 countries, representing over 90% of the world's population, send teams of up to six students, plus one team leader, one deputy leader, and observers. The content ranges from extremely difficult algebra and pre-calculus problems to problems on branches of mathematics not conventionally covered in secondary or high school and often not at university level either, such as projective and complex geometry, functional equations, combinatorics, and well-grounded number theory, of which extensive knowledge of theorems is required. Calculus, though allowed in solutions, is never required, as there is a principle that anyone with a basic understanding of mathematics should understand the problems, even if the solutions req ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Mathematics Olympiad
The International Mathematical Olympiad (IMO) is a mathematical olympiad for pre- university students, and is the oldest of the International Science Olympiads. The first IMO was held in Romania in 1959. It has since been held annually, except in 1980. More than 100 countries, representing over 90% of the world's population, send teams of up to six students, plus one team leader, one deputy leader, and observers. The content ranges from extremely difficult algebra and pre-calculus problems to problems on branches of mathematics not conventionally covered in secondary or high school and often not at university level either, such as projective and complex geometry, functional equations, combinatorics, and well-grounded number theory, of which extensive knowledge of theorems is required. Calculus, though allowed in solutions, is never required, as there is a principle that anyone with a basic understanding of mathematics should understand the problems, even if the solutions ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bronze Medal
A bronze medal in sports and other similar areas involving competition is a medal made of bronze awarded to the third-place finisher of contests or competitions such as the Olympic Games, Commonwealth Games, etc. The outright winner receives a gold medal and the second place a silver medal. More generally, bronze is traditionally the most common metal used for all types of high-quality medals, including artistic ones. The practice of awarding bronze third place medals began at the 1904 Olympic Games in St. Louis, Missouri, before which only first and second places were awarded. Olympic Games Minting Olympic medals is the responsibility of the host city. From 1928–1968 the design was always the same: the obverse showed a generic design by Florentine artist Giuseppe Cassioli with text giving the host city; the reverse showed another generic design of an Olympic champion. From 1972–2000, Cassioli's design (or a slight reworking) remained on the obverse with a custom d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Bucharest
The University of Bucharest ( ro, Universitatea din București), commonly known after its abbreviation UB in Romania, is a public university founded in its current form on by a decree of Prince Alexandru Ioan Cuza to convert the former Princely Academy into the current University of Bucharest, making one of the oldest modern Romanian universities. It is one of the five members of the ''Universitaria Consortium'' (the group of elite Romanian universities). The University of Bucharest offers study programmes in Romanian and English and is classified as an ''advanced research and education university'' by the Ministry of Education. In the 2012 QS World University Rankings, it was included in the top 700 universities of the world, together with three other Romanian universities. History The University of Bucharest was founded by the Decree no. 765 of 4 July 1864 by Alexandru Ioan Cuza and is a leading academic centre and a significant point of reference in society. The Uni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Master's Degree
A master's degree (from Latin ) is an academic degree awarded by universities or colleges upon completion of a course of study demonstrating mastery or a high-order overview of a specific field of study or area of professional practice. A master's degree normally requires previous study at the bachelor's degree, bachelor's level, either as a separate degree or as part of an integrated course. Within the area studied, master's graduates are expected to possess advanced knowledge of a specialized body of theoretical and applied topics; high order skills in analysis, [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Schur's Inequality
In mathematics, Schur's inequality, named after Issai Schur, establishes that for all non-negative real numbers ''x'', ''y'', ''z'', and ''t>0'', :x^t (x-y)(x-z) + y^t (y-z)(y-x) + z^t (z-x)(z-y) \ge 0 with equality if and only if ''x = y = z'' or two of them are equal and the other is zero. When ''t'' is an even positive integer, the inequality holds for all real numbers ''x'', ''y'' and ''z''. When t=1, the following well-known special case can be derived: :x^3 + y^3 + z^3 + 3xyz \geq xy(x+y) + xz(x+z) + yz(y+z) Proof Since the inequality is symmetric in x,y,z we may assume without loss of generality that x \geq y \geq z. Then the inequality : (x-y) ^t(x-z)-y^t(y-z)z^t(x-z)(y-z) \geq 0 clearly holds, since every term on the left-hand side of the inequality is non-negative. This rearranges to Schur's inequality. Extensions A generalization of Schur's inequality is the following: Suppose ''a,b,c'' are positive real numbers. If the triples ''(a,b,c)'' and ''(x,y,z)'' are ... [...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] |
1983 Births
The year 1983 saw both the official beginning of the Internet and the first mobile cellular telephone call. Events January * January 1 – The migration of the ARPANET to Internet protocol suite, TCP/IP is officially completed (this is considered to be the beginning of the true Internet). * January 24 – Twenty-five members of the Red Brigades are sentenced to life imprisonment for the 1978 murder of Italian politician Aldo Moro. * January 25 ** High-ranking Nazism, Nazi war crime, war criminal Klaus Barbie is arrested in Bolivia. ** IRAS is launched from Vandenberg AFB, to conduct the world's first all-sky infrared survey from space. February * February 2 – Giovanni Vigliotto goes on trial on charges of polygamy involving 105 women. * February 3 – Prime Minister of Australia Malcolm Fraser is granted a double dissolution of both houses of parliament, for 1983 Australian federal election, elections on March 5, 1983. As Fraser is being granted the dissolution, Bill Hayden ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
