2 lines
180 B
Markdown
Executable File
2 lines
180 B
Markdown
Executable File
$y=f(x),x\in V\subseteq D(y);y\in W\subseteq E(y)$
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$y=f(x)$ - сюрьективна, если: $\begin{cases}\forall y\in W\exists x\in V:f(x)=y\\ f^{-1}(W)\subseteq V\end{cases}$ |