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  2. Scope resolution operator - Wikipedia

    en.wikipedia.org/wiki/Scope_resolution_operator

    Scope resolution operator. In computer programming, scope is an enclosing context where values and expressions are associated. The scope resolution operator helps to identify and specify the context to which an identifier refers, particularly by specifying a namespace or class.

  3. Mathematical operators and symbols in Unicode - Wikipedia

    en.wikipedia.org/wiki/Mathematical_operators_and...

    The Arrows block (U+2190–U+21FF) contains line, curve, and semicircle arrows and arrow-like operators. The math subset of this block is U+2190–U+21A7, U+21A9–U+21AE, U+21B0–U+21B1, U+21B6–U+21B7, U+21BC–U+21DB, U+21DD, U+21E4–U+21E5, U+21F4–U+21FF.

  4. Toric code - Wikipedia

    en.wikipedia.org/wiki/Toric_code

    Since the stabilizer operators of the toric code are quasilocal, acting only on spins located near each other on a two-dimensional lattice, it is not unrealistic to define the following Hamiltonian, H T C = − J ∑ v A v − J ∑ p B p , J > 0. {\displaystyle H_{\rm {TC}}=-J\sum _{v}A_{v}-J\sum _{p}B_{p},\,\,\,J>0.}

  5. List of Boeing customer codes - Wikipedia

    en.wikipedia.org/wiki/List_of_Boeing_customer_codes

    Boeing 737 Next Generation: line number 6082. Boeing P-8 Poseidon: line number 6020. Boeing 747-8: line number 1534. Boeing 767: line number 1102. Boeing 777: line number 1422. Furthermore, customer codes have never been used for Boeing airplane models launched after the termination of customer codes, namely the 787, 737 MAX and 777X .

  6. Wireless telegraphy - Wikipedia

    en.wikipedia.org/wiki/Wireless_telegraphy

    Modern amateur radio operator transmitting Morse code. Wireless telegraphy or radiotelegraphy, commonly called CW ( continuous wave ), ICW (interrupted continuous wave) transmission, or on-off keying, and designated by the International Telecommunication Union as emission type A1A or A2A, is a radio communication method.

  7. Displacement operator - Wikipedia

    en.wikipedia.org/wiki/Displacement_operator

    Using this definition, we can write the multimode displacement operator as D ^ ψ ( α ) = exp ⁡ ( α A ^ ψ † − α ∗ A ^ ψ ) {\displaystyle {\hat {D}}_{\psi }(\alpha )=\exp \left(\alpha {\hat {A}}_{\psi }^{\dagger }-\alpha ^{\ast }{\hat {A}}_{\psi }\right)} ,

  8. Linear code - Wikipedia

    en.wikipedia.org/wiki/Linear_code

    A linear code of length n and dimension k is a linear subspace C with dimension k of the vector space where is the finite field with q elements. Such a code is called a q -ary code. If q = 2 or q = 3, the code is described as a binary code, or a ternary code respectively. The vectors in C are called codewords.

  9. Ellipsis (computer programming) - Wikipedia

    en.wikipedia.org/wiki/Ellipsis_(computer...

    Incomplete code. In Perl and Raku the 3-character ellipsis is also known as the "yada yada yada" operator and, similarly to its linguistic meaning, serves as a "stand-in" for code to be inserted later. Python3 also allows the 3-character ellipsis to be used as an expressive place-holder for code to be inserted later.

  10. d'Alembert operator - Wikipedia

    en.wikipedia.org/wiki/D'Alembert_operator

    d'Alembert operator. In special relativity, electromagnetism and wave theory, the d'Alembert operator (denoted by a box: ), also called the d'Alembertian, wave operator, box operator or sometimes quabla operator [1] ( cf. nabla symbol) is the Laplace operator of Minkowski space. The operator is named after French mathematician and physicist ...

  11. Rank error-correcting code - Wikipedia

    en.wikipedia.org/wiki/Rank_error-correcting_code

    In coding theory, rank codes (also called Gabidulin codes) are non-binary [1] linear error-correcting codes over not Hamming but rank metric. They described a systematic way of building codes that could detect and correct multiple random rank errors. By adding redundancy with coding k -symbol word to a n -symbol word, a rank code can correct ...