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There were 578 A350 aircraft in service with 44 operators as of December 24, 2023. [1] The largest operators are Singapore Airlines (63), Qatar Airways (53), Cathay Pacific (42), Delta Air Lines (30), Air China (27), Thai Airways International (23) and Lufthansa (21).
In linear algebra (and its application to quantum mechanics), a raising or lowering operator (collectively known as ladder operators) is an operator that increases or decreases the eigenvalue of another operator. In quantum mechanics, the raising operator is sometimes called the creation operator, and the lowering operator the annihilation ...
[1] [2] [a] Such operators often preserve properties, such as continuity. For example, differentiation and indefinite integration are linear operators; operators that are built from them are called differential operators, integral operators or integro-differential operators. Operator is also used for denoting the symbol of a mathematical operation.
There are many companies operating trains in the United Kingdom, including the operators of franchised passenger services, officially referred to as train operating companies (TOCs), as distinct from freight operating companies.
An adjoint operator of the conjugate-linear operator A on a complex Hilbert space H is an conjugate-linear operator A ∗ : H → H with the property: A x , y = x , A ∗ y ¯ for all x , y ∈ H . {\displaystyle \langle Ax,y\rangle ={\overline {\left\langle x,A^{*}y\right\rangle }}\quad {\text{for all }}x,y\in H.}
Operator is an American post-grunge band from Los Angeles, California, United States. The name Operator was used for a solo project created by Johnny Strong , an actor and musician, who has appeared in movies such as Black Hawk Down (2001), The Fast and the Furious (2001), Get Carter (2000) and The Glimmer Man (1996).
The semantics of operators particularly depends on value, evaluation strategy, and argument passing mode (such as Boolean short-circuiting). Simply, an expression involving an operator is evaluated in some way, and the resulting value may be just a value (an r-value), or may be an object allowing assignment (an l-value).
Operators of the MiG-21 in 2017 ... Finland was the first country outside the Warsaw Pact to buy MiG-21, after Finland had rejected the MiG-19.