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  2. Image (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Image_(mathematics)

    The preimage of an output value is the set of input values that produce . More generally, evaluating f {\displaystyle f} at each element of a given subset A {\displaystyle A} of its domain X {\displaystyle X} produces a set, called the " image of A {\displaystyle A} under (or through) f {\displaystyle f} ".

  3. SEC filing - Wikipedia

    en.wikipedia.org/wiki/SEC_filing

    Auto effective registration statement for securities of certain Canadian issuer under the Securities Act of 1933 F-10POS Post-effective amendment to a F-10EF registration F-1MEF A new registration statement filed under Rule 462(b) to add securities to a prior related effective registration statement filed on Form F-1 F-3

  4. Bijection, injection and surjection - Wikipedia

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

    This function maps each image to its unique preimage. The composition of two bijections is again a bijection, but if g ∘ f {\displaystyle g\circ f} is a bijection, then it can only be concluded that f {\displaystyle f} is injective and g {\displaystyle g} is surjective (see the figure at right and the remarks above regarding injections and ...

  5. Surjective function - Wikipedia

    en.wikipedia.org/wiki/Surjective_function

    If f : X → Y is surjective and B is a subset of Y, then f(f1 (B)) = B. Thus, B can be recovered from its preimage f1 (B). For example, in the first illustration in the gallery, there is some function g such that g(C) = 4. There is also some function f such that f(4) = C.

  6. Pullback (category theory) - Wikipedia

    en.wikipedia.org/wiki/Pullback_(category_theory)

    Then a pullback of f and g (in Set) is given by the preimage f1 [B 0] together with the inclusion of the preimage in A. f1 [B 0] ↪ A. and the restriction of f to f1 [B 0] f1 [B 0] → B 0. Because of this example, in a general category the pullback of a morphism f and a monomorphism g can be thought of as the "preimage" under ...

  7. Fiber (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Fiber_(mathematics)

    The fibers of are that line and all the straight lines parallel to it, which form a partition of the plane . More generally, if f {\displaystyle f} is a linear map from some linear vector space X {\displaystyle X} to some other linear space Y {\displaystyle Y} , the fibers of f {\displaystyle f} are affine subspaces of X {\displaystyle X ...

  8. Measurable function - Wikipedia

    en.wikipedia.org/wiki/Measurable_function

    In mathematics, and in particular measure theory, a measurable function is a function between the underlying sets of two measurable spaces that preserves the structure of the spaces: the preimage of any measurable set is measurable.

  9. Form S-1 - Wikipedia

    en.wikipedia.org/wiki/Form_S-1

    Form S-1 is an SEC filing used by companies planning on going public to register their securities with the U.S. Securities and Exchange Commission (SEC) as the "registration statement by the Securities Act of 1933". The S-1 contains the basic business and financial information on an issuer with respect to a specific securities offering.