Prove surjectivity using the injective property.
11813
Injective functions also surjective?
45380
Surjectivity implies injectivity and conversely
110014
Right Inverse for Surjective Function
59133
Show that an inverse of a bijective linear map is a linear map.
16413
Proving existence of surjective $f:\mathbb{N} \rightarrow A$ implies $A$ is at most countable.
109070
Question about the proof of the distributive property for sets
6023
Surjectivity of Composition of Surjective Functions
144188
Prove that $\cos(z)$ and $\sin(z)$ are surjective over the complex numbers.
102879
$\operatorname{Ext}$ and injectives, respectively projectives
89058
Question on finite Vector Spaces, injective, surjective and if $V$ is not finite
16092
How to prove that the composition of two surjective functions is surjective
74453
Injective and Surjective Functions
133083
Injectivity and surjectivity of a recursive function
38033
A surjective linear map into a finite dimensional space is open
88278
Show $S = f^{-1}(f(S))$ for all subsets $S$ iff $f$ is injective
136842
$|x-f(x)|<5777$, Show that $f$ is surjective
155266
Is $\exp:\overline{\mathbb{M}}_n\to\mathbb{M}_n$ injective?