Proposition: Composition of Surjective Functions is Surjective

Let $A,B,C$ be sets and let $f:A\to B$ and $g:B\to C$ be surjective functions. Then the composition $(g\circ f):A\to C$ is also surjective.

Proofs: 1

Proofs: 1


Thank you to the contributors under CC BY-SA 4.0!

Github:
bookofproofs


References

Bibliography

  1. Kane, Jonathan: "Writing Proofs in Analysis", Springer, 2016