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  2. Triangular number - Wikipedia

    en.wikipedia.org/wiki/Triangular_number

    Triangular numbers are a type of figurate number, other examples being square numbers and cube numbers. The n th triangular number is the number of dots in the triangular arrangement with n dots on each side, and is equal to the sum of the n natural numbers from 1 to n. The sequence of triangular numbers, starting with the 0th triangular number, is

  3. Python (programming language) - Wikipedia

    en.wikipedia.org/wiki/Python_(programming_language)

    An immutable sequence of numbers commonly used for looping a specific number of times in for loops [120] range (− 1, 10) range (10, − 5, − 2) set: mutable Unordered set, contains no duplicates; can contain mixed types, if hashable {4.0, 'string', True} set str: immutable A character string: sequence of Unicode codepoints 'Wikipedia ...

  4. List of varieties of Chinese - Wikipedia

    en.wikipedia.org/wiki/List_of_varieties_of_Chinese

    A Mandarin Chinese and Miao mixed language Maojia: 猫家话: 貓家話: A Qo-Xiong Miao and Chinese dialects mixed language Shaozhou Tuhua: 韶州土话: 韶州土話: A group of distinctive Chinese dialects in South China, including Yuebei Tuhua and Xiangnan Tuhua. It incorporates several Chinese dialects, as well as Yao languages. Tangwang ...

  5. Simplex algorithm - Wikipedia

    en.wikipedia.org/wiki/Simplex_algorithm

    In mathematical optimization, Dantzig's simplex algorithm (or simplex method) is a popular algorithm for linear programming. [1]The name of the algorithm is derived from the concept of a simplex and was suggested by T. S. Motzkin. [2]

  6. Chess - Wikipedia

    en.wikipedia.org/wiki/Chess

    The number of legal positions in chess is estimated to be (4.59 ± 0.38) × 10 44 with a 95% confidence level, [155] with a game-tree complexity of approximately 10 123. The game-tree complexity of chess was first calculated by Claude Shannon as 10 120, a number known as the Shannon number. [156]

  7. Estonia - Wikipedia

    en.wikipedia.org/wiki/Estonia

    A simplified tax system with flat rates and low indirect taxation, openness to foreign investment, and a liberal trade regime have supported the resilient and well-functioning economy. [356] As of May 2018 [update] , the Ease of Doing Business Index by the World Bank Group places the country 16th in the world. [ 357 ]

  8. Paper Mario: The Origami King - Wikipedia

    en.wikipedia.org/wiki/Paper_Mario:_The_Origami_King

    Paper Mario: The Origami King [b] is a 2020 role-playing video game developed by Intelligent Systems and published by Nintendo for the Nintendo Switch console. Following Paper Mario: Color Splash (2016), it is the sixth game in the Paper Mario series, which is part of the larger Mario franchise.

  9. Dark matter - Wikipedia

    en.wikipedia.org/wiki/Dark_matter

    [18] [19] Wm. Thomson, Lord Kelvin, discussed the potential number of stars around the Sun in the appendices of a book based on a series of lectures given in 1884 in Baltimore. [ 20 ] [ 18 ] He inferred their density using the observed velocity dispersion of the stars near the Sun, assuming that the Sun was 20–100 million years old.