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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.

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Proofs: 1

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Proofs: 1

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References

Bibliography

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