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  2. Numero sign - Wikipedia

    en.wikipedia.org/wiki/Numero_sign

    The numero sign or numero symbol, № (also represented as Nº, No̱, №, No., or no.), [1] [2] is a typographic abbreviation of the word number(s) indicating ordinal numeration, especially in names and titles. For example, using the numero sign, the written long-form of the address "Number 29 Acacia Road" is shortened to "№ 29 Acacia Rd ...

  3. Ñ - Wikipedia

    en.wikipedia.org/wiki/Ñ

    Historically, ñ arose as a ligature of nn ; the tilde was shorthand for the second n , written over the first; [2] compare umlaut, of analogous origin. It is a letter in the Spanish alphabet that is used for many words—for example, the Spanish word año "year" ( anno in Old Spanish ) derived from Latin : annus .

  4. Telex (input method) - Wikipedia

    en.wikipedia.org/wiki/Telex_(input_method)

    The Telex input method is based on a set of rules for transmitting accented Vietnamese text over telex (máy điện tín) first used in Vietnam during the 1920s and 1930s. Telex services at the time ran over infrastructure that was designed overseas to handle only a basic Latin alphabet , so a message reading " vỡ đê " ("the dam broke ...

  5. Natural number - Wikipedia

    en.wikipedia.org/wiki/Natural_number

    With this definition, given a natural number n, the sentence "a set S has n elements" can be formally defined as "there exists a bijection from n to S." This formalizes the operation of counting the elements of S. Also, n ≤ m if and only if n is a subset of m. In other words, the set inclusion defines the usual total order on the natural numbers.

  6. Quadratic residue - Wikipedia

    en.wikipedia.org/wiki/Quadratic_residue

    Modulo 2, every integer is a quadratic residue. Modulo an odd prime number p there are (p + 1)/2 residues (including 0) and (p − 1)/2 nonresidues, by Euler's criterion.In this case, it is customary to consider 0 as a special case and work within the multiplicative group of nonzero elements of the field (/).

  7. Filipino alphabet - Wikipedia

    en.wikipedia.org/wiki/Filipino_alphabet

    The letters C/c, F/f, J/j, Ñ/ñ, Q/q, V/v, X/x, and Z/z are not used in most native Filipino words, but they are used in a few to some native and non-native Filipino words that are and that already have been long adopted, loaned, borrowed, used, inherited and/or incorporated, added or included from the other languages of and from the Philippines, including Chavacano and other languages that ...

  8. Principal quantum number - Wikipedia

    en.wikipedia.org/wiki/Principal_quantum_number

    [citation needed] Accounting for two states of spin, each n-shell can accommodate up to 2n 2 electrons. In a simplistic one-electron model described below, the total energy of an electron is a negative inverse quadratic function of the principal quantum number n , leading to degenerate energy levels for each n > 1. [ 1 ]

  9. House of Nguyễn Phúc - Wikipedia

    en.wikipedia.org/wiki/House_of_Nguyễn_Phúc

    Referred to as the Long tinh or Dragon Star Flag. [41] 1920–1945: Flag of emperors Khải Định and Bảo Đại: A yellow field with a single red stripe. Referred to as the Long tinh or Dragon Star Flag. [41] 8 May–30 August 1945: Flag of emperor Bảo Đại: A yellow field with a single red stripe. Referred to as the Long tinh or ...