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In logic, a set of symbols is commonly used to express logical representation. The following table lists many common symbols, together with their name, how they should be read out loud, and the related field of mathematics.
7 is the only number D for which the equation 2 n − D = x 2 has more than two solutions for n and x natural. In particular, the equation 2 n − 7 = x 2 is known as the Ramanujan–Nagell equation. 7 is one of seven numbers in the positive definite quadratic integer matrix representative of all odd numbers: {1, 3, 5, 7, 11, 15, 33}. [19] [20]
The dual of a 7-cube is called a 7-orthoplex, and is a part of the infinite family of cross-polytopes.. Applying an alternation operation, deleting alternating vertices of the hepteract, creates another uniform polytope, called a demihepteract, (part of an infinite family called demihypercubes), which has 14 demihexeractic and 64 6-simplex 6-faces.
In mathematics, E 7 is the name of several closely related Lie groups, linear algebraic groups or their Lie algebras e 7, all of which have dimension 133; ...
Đinh Bộ Lĩnh was born in 924 in Hoa Lư (south of the Red River Delta, in what is today Ninh Bình Province).Growing up in a local village during the disintegration of the Chinese Tang dynasty that had dominated Vietnam for centuries, Đinh Bộ Lĩnh became a local military leader at a very young age.
[7] [1] Not every word in another language that has the initial consonant /p/ have the corresponding Vietnamese loanword with the initial consonant /p/. In some words, the sound /p/ is replaced by the sound /ɓ/. For example, both syllables of the word búp bê (derived from the French word poupée /pu.pe/) have the initial consonant /ɓ/, not ...
Vietnam, [e] [f] officially the Socialist Republic of Vietnam, [g] [h] is a country at the eastern edge of mainland Southeast Asia, with an area of about 331,000 square kilometres (128,000 sq mi) and a population of over 100 million, making it the world's fifteenth-most populous country.
The Jiaqing Emperor also freed all the followers of Lê Chiêu Thống who were imprisoned in China to go back to Vietnam. [113] Lê Chiêu Thống's remains are buried in Bàn Thạch village, Thanh Hóa, Vietnam. [113] He was posthumously given the title Mẫn Đế (愍帝). Modern descendants of the Lê dynasty live in southern Vietnam ...