TheoremBase

Continuous Image of a Compact Space is Compact

Statement

Let (X,TX)(X,\mathcal{T}_X) and (Y,TY)(Y,\mathcal{T}_Y) be topological spaces, and let f:X→Yf:X\to Y be a continuous map. If XX is compact, then the image

f(X)={f(x):x∈X}f(X)=\{f(x):x\in X\}

is compact in YY.

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