Injective Functions (and a Proof!) | Injections, One to One Functions, Injective Proofs
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YouTubeWrath of Math
Injective Functions (and a Proof!) | Injections, One to One Functions, Injective Proofs
What is an injective function? How do we prove a function is injective? Sometimes called an injection, or a one-to-one function, we’ll be defining injective functions in today’s video math lesson! We’ll also go over some examples of injective functions, examples of functions that aren’t injective, and we’ll briefly go over two ways to ...
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SOLVED: Using the precise definition of a function and a little logic, show that for every set Y there is exactly one function f from to Y When is injective? Surjective? Let X be a set. Show that there are either no functions from X to Ol' exactly one Such funetion, depending OH whether X = 0 Ol' X =0
SOLVED: Using the precise definition of a function and a little logic, show that for every set Y there is exactly one function f from to Y When is injective? Surjective? Let X be a set. Show that there are either no functions from X to Ol' exactly one Such funetion, depending OH whether X = 0 Ol' X =0
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