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  2. Pearson symbol - Wikipedia

    en.wikipedia.org/wiki/Pearson_symbol

    The Pearson symbol, or Pearson notation, is used in crystallography as a means of describing a crystal structure. [1] It was originated by William Burton Pearson and is used extensively in Pearson's handbook of crystallographic data for intermetallic phases. [2] The symbol is made up of two letters followed by a number. For example: Diamond ...

  3. The New York Times Spelling Bee - Wikipedia

    en.wikipedia.org/wiki/The_New_York_Times...

    Pangrams awards double points (e.g. a seven-letter pangram scores 14 points). [1] [2] If the player finds all of the possible words in a given puzzle, they achieve the title of "Queen Bee". [3] In 2021, the editor Sam Ezersky stated his intention to never include the letter S in a puzzle. He said this inclusion would make the game too simple to ...

  4. Unicode subscripts and superscripts - Wikipedia

    en.wikipedia.org/wiki/Unicode_subscripts_and...

    The most common superscript digits (1, 2, and 3) were included in ISO-8859-1 and were therefore carried over into those code points in the Latin-1 range of Unicode. The remainder were placed along with basic arithmetical symbols, and later some Latin subscripts, in a dedicated block at U+2070 to U+209F.

  5. Satisfiability - Wikipedia

    en.wikipedia.org/wiki/Satisfiability

    If A is a structure, φ is a formula, and a is a collection of elements, taken from the structure, that satisfy φ, then it is commonly written that A ⊧ φ [a] If φ has no free variables, that is, if φ is an atomic sentence, and it is satisfied by A, then one writes A ⊧ φ

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  7. Scrabble letter distributions - Wikipedia

    en.wikipedia.org/wiki/Scrabble_letter_distributions

    4 point: H ×2, J ×2, P ×2, Õ ×2, B ×1; 5 point: Ä ×2, Ü ×2; 6 point: Ö ×2; 8 point: F ×1; 10 point: Š ×1, Z ×1, Ž ×1; C, Q, W, X and Y are absent because these letters are only used in foreign words and are not an official part of the alphabet. Arguably F, Š, Z and Ž do not exist either, but they were included so that ...

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  9. Prouhet–Tarry–Escott problem - Wikipedia

    en.wikipedia.org/wiki/Prouhet–Tarry–Escott...

    Prouhet used the Thue–Morse sequence to construct a solution with = for any .Namely, partition the numbers from 0 to + into a) the numbers each with an even number of ones in its binary expansion and b) the numbers each with an odd number of ones in its binary expansion; then the two sets of the partition give a solution to the problem. [3]