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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.
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 ...
Airline codes IATA ICAO Airline Call sign Country Comments JTN JET TEST United States JGJ Jinggong Jet: GLOBAL JINGGONG China 2014, 2023: JNY Journey Aviation: ROCKBAND United States 2023: Callsign "ROCKBAND"; Former Call Sign/Telephony Designator: UNIJET-ROCKBAND (2014) JKR Justice Air Charter: JOKER United States
United States. I2. IBS. Iberia Express. IBEREXPRESS. Spain. Charter service, low cost carrier for EU flights of Iberia operating only A320s. IBR. Ibertour Servicios Aéreos.
10. NANP member. Argentina. +54. 9/15. 10. All carriers: Claro, Movistar, Personal, Tuenti. 15 before the local number but after long distance area code for national calls (0 11 15 xxxx-xxxx) and 9 placed after the international access code excluding the 15 for international calls (+54 9 11 xxxx-xxxx). Armenia.
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 .
In November 2020, Afilias was acquired by the domain name registry operator Donuts. Managed TLDs. Identity Digital / Donuts is either the ICANN-approved sponsor organization or owns controlling interest in the ICANN-approved sponsor organization for 264 top-level domains, approximately 30% of all generally-available TLDs.
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.
Air Force Specialty Code. The Air Force Specialty Code ( AFSC) is an alphanumeric code used by the United States Air Force to identify a specific job. Officer AFSCs consist of four characters and enlisted AFSCs consist of five characters. A letter prefix or suffix may be used with an AFSC when more specific identification of position ...
In quantum mechanics, for systems where the total number of particles may not be preserved, the number operator is the observable that counts the number of particles. The following is in bra–ket notation: The number operator acts on Fock space. Let. be a Fock state, composed of single-particle states drawn from a basis of the underlying ...