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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. 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 : ′ = ′ = ′ (()).

4. Full and faithful functors - Wikipedia

   en.wikipedia.org/wiki/Full_and_faithful_functors

   A faithful functor need not be injective on objects or morphisms. That is, two objects X and X′ may map to the same object in D (which is why the range of a full and faithful functor is not necessarily isomorphic to C), and two morphisms f : X → Y and f′ : X′ → Y′ (with different domains/codomains) may map to the same morphism in D.

5. After Pornhub left Florida, VPN demand surged by more ... - AOL

   www.aol.com/pornhub-left-florida-vpn-demand...

   VpnMentor said it "detected a surge of 1,150% in VPN demand" in Florida in the first few hours after the law took effect at the start of the year. The company described the surge as "staggering."

6. 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).

7. SafeCentral - AOL Help

   help.aol.com/products/safecentral

   Block hackers and identity thieves from stealing your personal information and passwords -- even if your PC is already infected with a virus or spyware.