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  2. Bijection, injection and surjection - Wikipedia

    en.wikipedia.org/wiki/Bijection,_injection_and...

    Injective composition: the second function need not be injective. A function is injective (one-to-one) if each possible element of the codomain is mapped to by at most one argument. Equivalently, a function is injective if it maps distinct arguments to distinct images. An injective function is an injection. [1] The formal definition is the ...

  3. FXX - Wikipedia

    en.wikipedia.org/wiki/FXX

    In January 2013, it was reported by various media outlets that sports-focused channel Fox Soccer would be shut down and be replaced with a general entertainment network that would act as a brother service to FX; while FXX was a possible name from the start, another name proposed for the new network was FX2. [7]

  4. FxPro - Wikipedia

    en.wikipedia.org/wiki/FxPro

    FxPro UK Limited, a wholly owned subsidiary of FxPro Group Ltd, is licensed and fully regulated by the Financial Conduct Authority in the United Kingdom. [18] [19] FxPro UK Limited formerly traded as an introducer for its parent company and did not provide brokerage services or hold client funds until June 2012, when the company updated its FCA license to accept UK clients.

  5. FXX (Canadian TV channel) - Wikipedia

    en.wikipedia.org/wiki/FXX_(Canadian_TV_channel)

    As part of the launch, several shows which previously aired on FX Canada moved to FXX. In addition, a Canadian version of the FXNOW app, which allows viewers to watch shows from FX and FXX, was launched. [5] On the day of the launch, FX Canada's website was completely revamped to include program information from both FX-branded channels.

  6. List of songs recorded by f(x) - Wikipedia

    en.wikipedia.org/wiki/List_of_songs_recorded_by_f(x)

    f(x) at Jeju K-pop Festival, in October 2015 From left to right: Victoria, Krystal, Amber, Luna. f(x) is a South Korean girl group formed by SM Entertainment in 2009. Their debut "LA chA TA" was released on September 1. They also released their first physical single, "Chu~♡", on November 9.

  7. Injective function - Wikipedia

    en.wikipedia.org/wiki/Injective_function

    In mathematics, an injective function (also known as injection, or one-to-one function [1]) is a function f that maps distinct elements of its domain to distinct elements of its codomain; that is, x 1 ≠ x 2 implies f(x 1) ≠ f(x 2) (equivalently by contraposition, f(x 1) = f(x 2) implies x 1 = x 2).

  8. Surjective function - Wikipedia

    en.wikipedia.org/wiki/Surjective_function

    The function g : R → R defined by g(x) = x 2 is not surjective, since there is no real number x such that x 2 = −1. However, the function g : R → R ≥0 defined by g(x) = x 2 (with the restricted codomain) is surjective, since for every y in the nonnegative real codomain Y, there is at least one x in the real domain X such that x 2 = y.

  9. Inverse function theorem - Wikipedia

    en.wikipedia.org/wiki/Inverse_function_theorem

    For functions of a single variable, the theorem states that if is a continuously differentiable function with nonzero derivative at the point ; then is injective (or bijective onto the image) in a neighborhood of , the inverse is continuously differentiable near = (), and the derivative of the inverse function at is the reciprocal of the derivative of at : ′ = ′ = ′ (()).