Order Embedding is Increasing Mapping
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Theorem
Let $\left({S_1, \preceq_1}\right)$, $\left({S_2, \preceq_2}\right)$ be ordered sets.
Let $f:S_1 \to S_2$ be an order embedding.
Then $f$ is increasing mapping.
Proof
By definition of order embedding:
- $\forall x, y \in S_1: x \preceq_1 y \implies f\left({x}\right) \preceq_2 f\left({y}\right)$
Hence $f$ is an increasing mapping.
$\blacksquare$