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  2. Raycom Sports - Wikipedia

    en.wikipedia.org/wiki/Raycom_Sports

    Raycom Sports is a Charlotte, North Carolina –based producer of sports television programs owned by Gray Television . It was founded in 1979 by husband and wife, Rick and Dee Ray. In the 1980s, Raycom Sports established a prominent joint venture with Jefferson-Pilot Communications which made them partners on the main Atlantic Coast Conference ...

  3. Bright House Networks - Wikipedia

    en.wikipedia.org/wiki/Bright_House_Networks

    Bright House Networks, LLC also simply known as Bright House, was an American telecom company. Prior to its purchase by Charter Communications, it was the tenth-largest multichannel video service provider and the 6th largest cable internet provider (based on coverage) in the United States. [2]

  4. Amateur radio operator - Wikipedia

    en.wikipedia.org/wiki/Amateur_radio_operator

    An amateur radio operator is someone who uses equipment at an amateur radio station to engage in two-way personal communications with other amateur operators on radio frequencies assigned to the amateur radio service. Amateur radio operators have been granted an amateur radio license by a governmental regulatory authority after passing an ...

  5. Creation and annihilation operators - Wikipedia

    en.wikipedia.org/wiki/Creation_and_annihilation...

    Creation and annihilation operators. Creation operators and annihilation operators are mathematical operators that have widespread applications in quantum mechanics, notably in the study of quantum harmonic oscillators and many-particle systems. [1] An annihilation operator (usually denoted ) lowers the number of particles in a given state by one.

  6. List of companies operating trains in the United Kingdom

    en.wikipedia.org/wiki/List_of_companies...

    The following brands are used: Northern Ireland Railways. Enterprise service from Dublin Connolly to Belfast Lanyon Place on the Belfast-Dublin line joint venture between Northern Ireland Railways and Iarnród Éireann. Iarnród Éireann, Operates 2 Northern Commuter services a day to/from Newry.

  7. List of mobile network operators in Asia and Oceania - Wikipedia

    en.wikipedia.org/wiki/List_of_mobile_network...

    Rank Operator Technology Subscribers (in millions) Ownership 1: Grameenphone: 2G: GSM-900 /1800 MHz (GPRS, EDGE) 3G: 2100 MHz UMTS, HSPA, HSPA+, DC-HSPA+ (3G is being discontinued on more than 32 districts out of 64 districts on Phase-1)

  8. Ladder operator - Wikipedia

    en.wikipedia.org/wiki/Ladder_operator

    The term "ladder operator" or "raising and lowering operators" is also sometimes used in mathematics, in the context of the theory of Lie algebras and in particular the affine Lie algebras. For example to describe the su (2) subalgebras, the root system and the highest weight modules can be constructed by means of the ladder operators. [1]

  9. 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 ...

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